| 1. |
- Appelros, Peter, et al.
(författare)
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Comorbidity in Stroke-Survivors : Prevalence and Associations with Functional Outcomes and Health
- 2021
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier. - 1052-3057 .- 1532-8511. ; 30:10
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: The purpose of this study was to evaluate the prevalence and impact of stroke-related comorbidity in a community-based sample of stroke survivors. We sought to find out which types of comorbidity that were most important with respect to the patients' functional outcomes and general health.MATERIALS AND METHODS: All stroke survivors (n = 330) living in a medium-sized Swedish municipality were included. Patient records were reviewed to determine the presence of comorbidities. A selection of patient reported outcomes were used to assess subjective symptoms, functional outcomes, and general health. Logistic regression models were used to investigate the association between comorbidities, residual symptoms, and subjective symptoms on the one hand, and functional outcomes and general health on the other hand.RESULTS: Hypertension (80%) was the most common cardiovascular risk factor. Ischemic heart disease was found in 18% and congestive heart failure in 10%. Of non-cardiovascular disorders, orthopaedic diseases were commonest (30%). Psychiatric disorders and cognitive impairment were present in 11% and 12% respectively. Hemiparesis is associated with both functional outcomes and general health. Additionally, orthopedic disorders, vertigo, cognitive impairment, nicotine use, chronic pulmonary disorders, and age, are associated with different functional outcomes. Psychiatric, orthopedic and neurological disorders are related to general health. The patient-reported outcome measure "feeling of tiredness" is important for many of the outcomes, while "feeling depressed" and "having pain" are associated with general health.CONCLUSIONS: Many medical conditions, several of which have received little attention so far, are associated with functional outcome and general health in stroke survivors. If the intention is to describe comorbidity relevant to function and general health in stroke patients, disorders that hitherto have received little attention, must be considered.
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| 2. |
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| 3. |
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| 4. |
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| 5. |
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| 6. |
- Bergersen, Hilde, et al.
(författare)
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Anxiety, depression, and psychological well-being 2 to 5 years poststroke.
- 2010
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Ingår i: Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association. - : Elsevier BV. - 1532-8511. ; 19:5, s. 364-9
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: We sought to explore psychological well-being and the psychosocial situation in persons with stroke, 2 to 5 years after discharge from a specialized rehabilitation hospital. METHODS: The Hospital Anxiety and Depression Scale; the 30-item General Health Questionnaire; and a questionnaire were mailed to 255 former patients. RESULTS: A total of 64% answered (36% women), and the average age was 58 years. The Hospital Anxiety and Depression Scale identified problems in 47% (anxiety in 36% and depression in 28%) and 30-item General Health Questionnaire in 54%. About half had experienced periods of anxiety, depression, or both since discharge. Most were satisfied with support by family/friends (88%), home ward (68%), and community therapy services (57%). Marital status was as in the general population. CONCLUSIONS: Long after stroke, almost half of the investigated patients with stroke had psychiatric problems according to the questionnaires. This is higher than in the general population but is comparable with some other chronic, somatic populations in Norway.
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| 7. |
- Björkdahl, Ann, 1959-, et al.
(författare)
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How can we tell who is aware? Where does the veracity lie?
- 2012
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 21:8, s. 812-818
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The first aim of this study was to compare the subjective experiences of social, cognitive, and emotional problems of the patient and his/her next of kin, and explore if this related to cognitive testing. The second aim was to explore how these results reflect the patient's awareness.METHODS: This is a subanalysis from a longitudinal study in the first year after discharge with comparisons of patient and next of kin scores on the European Brain Injury Questionnaire (EBIQ) and analyses of the relationship of their scores to an objective cognitive screening on 3 occasions. A paired t test was used to explore differences between 35 stroke patients and their next of kin on the EBIQ. Gamma analyses were made to explore the relationship between the EBIQ scores and the Barrow Neurological Institute Screening (BNIS) of higher cognitive functions, with the entire sample grouped into aware and unaware according to the BNIS item of awareness.RESULTS: We found significant differences between the patient and next of kin assessments on all occasions, apart from at discharge. When grouped, only the group of aware patients differed significantly from their next of kin. Significant relations of the patient ratings on the EBIQ and BNIS were only found at the 1-year follow-up for the unaware group and the entire sample. Next of kin EBIQ scores did not correlate with the BNIS.CONCLUSIONS: Neither next of kin ratings nor an objective measurement was feasible to use for evaluation of the patient's awareness of social, cognitive, and emotional problems.
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| 8. |
- Björkdahl, Ann, 1959-, et al.
(författare)
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The structural properties of the European Brain Injury Questionnaire.
- 2004
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 13:3, s. 122-128
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: We sought to examine the reliability and validity of the European Brain Injury Questionnaire as an evaluation tool in a stroke population by applying the Rasch methodology.METHODS: The European Brain Injury Questionnaire was distributed to 54 patients with stroke and 36 next of kin at discharge from the rehabilitation ward and at a 1-year follow-up. Rasch analysis was used for evaluating the psychometric characteristic and the quality of the measures produced with focus on reliability and validity. The reliability was determined by the separation. The construct validity was determined by examining the hierarchy of the tasks and by evaluating the fit of individual tasks to the latent construct. Analyses of differences across occasions, and across patients and next of kin, were made to examine the stability of the instrument.RESULTS: The reliability was good as the instrument met the criteria for separation. Two items at discharge and 5 items at 1-year follow-up were misfits. If not more than 5% of the items fail to fit the Rasch model the instrument can be considered unidimensional, which in this case only concerned the 1-year follow-up. The instrument was stable over time and across patients and next of kin.CONCLUSION: With some alterations the European Brain Injury Questionnaire seems to be a useful instrument in clinical practice and research, and a help to capture the social, emotional, and cognitive impacts of a stroke.
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| 9. |
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| 10. |
- Carlsson, Gunnel, 1950, et al.
(författare)
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Coming home in the context of very early supported discharge after stroke - An interview study of patients' experiences
- 2024
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Ingår i: JOURNAL OF STROKE & CEREBROVASCULAR DISEASES. - 1052-3057 .- 1532-8511. ; 33:9
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: To explore patients' experiences of coming home and managing everyday life within the context of very early supported discharge after stroke (VESD). Study design: An explorative qualitative study using semi structured interviews. Method: This study was nested within a randomised controlled trial,; Gothenburg Very Early Supported Discharge (GOTVED), comparing a home rehabilitation intervention given by a coordinated team (VESD) with conventional care. Eleven participants with a median age 70.0 years (range 63-95) of which nine scoring 0-4 on the NIHSS indicating no symptoms or minor stroke were interviewed on average 12 days after discharge. Data was analysed using thematic analysis. Results: The diversity of patients' experiences was reflected in the overarching main theme Very Early Supported Discharge after stroke - a multifaceted experience, built upon five themes: "Conditions surrounding the discharge", "Concerns about the condition", "Confronting a new everyday life", "Experiences of the intervention" and the "Role of next of kin". Conclusions: The respondents were largely satisfied with the very early supported discharge which might be expected, given that it was well planned regarding timing, individualisation and content. The patients need to be aware of the purpose of the VESD intervention. Due to the unpredictability of the stroke and its consequences, interventions need to be flexible. Goal setting is important but must be comprehensible. The role and burden of next of kin should be addressed and negotiated, and the ending of the intervention must be planned, with seamless transition to further rehabilitation and social support including the issue of participation in everyday life.
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| 11. |
- Csecsei, P., et al.
(författare)
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Risk analysis of post-procedural intracranial hemorrhage based on STAY ALIVE Acute Stroke Registry
- 2020
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - New York : Demos Publishing. - 1052-3057 .- 1532-8511. ; 29:7
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Tidskriftsartikel (refereegranskat)abstract
- Background: Intracranial hemorrhages (ICH) are classified as symptomatic or asymptomatic according to the presence of clinical deterioration. Here, we aimed to find predictive factors of symptomatic intracranial bleeding in a registry-based stroke research.Methods: Data of consecutive patients with acute ischemic stroke (AIS) were extracted from the prospective STAY ALIVE stroke registry. Analysis of the total population and treatment sugroups such as endovascular thrombectomy (EVT), intravenous thrombolysis (IVT), or their combination (IVT+EVT) were also done. Outcome measures were ICH, 30- and 90-day clinical outcome based on the modified Rankin Scale (mRS:0-2 as favorable outcome). The hemorrhage was captured by a non-enhanced CT of the skull within 24 h after procedure.Results: A total of 355 patients (mean age: 68 +/- 11; female N=177 (49.9%); EVT n=131 (36.9%); IVT n=157 (44.2%); IVT+EVT n=67 (18.9%) were included in the analysis. The total number of ICH was 47 (13%), symptomatic (sICH) 12 (3.4%) and asymptomatic (aICH) 35 (9.9%) in the whole population. NIHSS >= 15.5 at 24 post stroke hours predicted sICH with a sensitivity of 100% and a specificity of 92% (p<0.001). Furthermore, lower age, good collateral circulation on initial CT angiography and lower NIHSS score measured at 24 h independently associated with a favorable 90-day outcome, whereas baseline NIHSS and ASPECT score were not.Conclusion: Although partial recanalization, ASPECT< 6, and poor collaterals were significantly associated with sICH, the only independent predictor was NIHSS >= 15.5 at 24 post stroke hours. This suggests a careful evaluation of patients with worsening NIHSS despite an adequate therapy.
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| 12. |
- Cvetkovic, Jasmina Trifunovic, et al.
(författare)
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Polymorphisms of IL-1beta, IL-1Ra, and TNF-alpha genes : A nested case-control study of their association with risk for stroke
- 2005
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 14:1, s. 29-35
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Tidskriftsartikel (refereegranskat)abstract
- Certain alleles of cytokine genes interleukin-1 beta (IL-1β), interleukin-1 receptor antagonist (IL-1Ra), and tumor necrosis factor alpha (TNF-α) are correlated with increased production of the proteins. The aim of this study was to investigate polymorphisms of these genes and their possible correlation with the development of stroke. This matched case-control study was nested within the population-based Västerbotten Intervention Program (VIP) cohort and the Northern Sweden World Health Organization MONICA (Multinational Monitoring of Trends and Determinants in Cardiovascular Diseases) cohort, based on individuals who were free from cardiovascular events when the cohorts were established. After an average period of 34.1 months, 113 individuals developed stroke and to each case 2 individuals not suffering from cardiovascular events were matched to serve as controls. Polymerase chain reaction amplification was used to analyze genetic polymorphisms. There was no association between polymorphic sites of the IL-1β and IL-1Ra genes and stroke. Carriage of haplotype A2+IL-1β/A2+IL-1Ra was significantly increased in normotensive cases (23.1%) compared with normotensive controls (8.9%) (odds ratio [OR] = 3.07; P = .045). In hypertensive male cases, there was an association between the A1A1 genotype of TNF-α and risk of stroke (OR = 2.46; P = .034). Our findings indicate an association between allele A1 of the TNF-α NcoI polymorphism and stroke in hypertensive male cases, as well as an association between haplotype A2+IL-1β/A2+IL-1Ra and stroke in normotensive cases.
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| 13. |
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| 14. |
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| 15. |
- Eleftheriou, Andreas, et al.
(författare)
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Tick-borne Encephalitis: Stroke-like Presentation
- 2019
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : ELSEVIER. - 1052-3057 .- 1532-8511. ; 28:8, s. E119-E122
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Tidskriftsartikel (refereegranskat)abstract
- Tick-borne encephalitis, caused by the tick-borne virus (TBEV), is endemic in central, eastern, and northern Europe eastwards through Russian Siberia and China. For the year 2009, the highest incidence in Scandinavian countries was in Sweden. The clinical symptoms have a wide spectrum. We report a unique case of clinical symptoms and radiological findings compatible with a stroke-like inflammatory lesion in the thalamus, suggesting microangiopathy from TBEV. Our case shows that TBEV could be a possible cause of stroke-like lesions.
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| 16. |
- Ellström, Katarina, et al.
(författare)
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Associations of carotid artery flow parameters with MRI markers of cerebral small vessel disease and patterns of brain atrophy
- 2023
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1532-8511 .- 1052-3057. ; 32:3
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: A growing body of evidence links age related brain pathologies to systemic vascular processes. We aimed to study the prevalence and interrelations between magnetic resonance imaging (MRI) markers of cerebral small vessel disease and patterns of brain atrophy, and their association to carotid duplex ultrasound flow parameters.MATERIALS AND METHODS: We investigated a population based randomised cohort of older adults (n=391) aged 70-87, part of the Swedish Good Aging in Skåne Study. Peak systolic and end diastolic velocities of the carotid arteries were measured by ultrasound, and resistivity- and pulsatility indexes were calculated. Subjects with increased peak systolic velocity indicating carotid stenosis were excluded from analysis. Nine MRI findings were rated by visual scales: white matter changes, pontine white matter changes, microbleeds, lacunar infarctions, medial temporal lobe atrophy, global cortical atrophy, parietal atrophy, precuneus atrophy and central atrophy.RESULTS: MRI pathologies were found in 80% of subjects. Mean end diastolic velocity in common carotid arteries was inversely associated with white matter hyperintensities (OR=0.92; p=0.004), parietal lobe atrophy (OR=0.94; p=0.039), global cortical atrophy (OR=0.90; p=0.013), precuneus atrophy (OR=0.94; p=0.022), "number of CSV pathologies" (β=-0.07; p<0.001) and "MRI-burden score" (β=-0.11; p<0.001), after adjustment for age and sex. The latter three were also associated with pulsatility and resistivity indexes.CONCLUSIONS: Low carotid end diastolic velocity, as well as increased carotid resistivity and pulsatility, were associated with signs of cerebral small vessel disease and patterns of brain atrophy, indicating a vascular component in the process of brain aging.
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| 17. |
- Fitzgerald, Seán, et al.
(författare)
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Large Artery Atherosclerotic Clots are Larger than Clots of other Stroke Etiologies and have Poorer Recanalization rates.
- 2021
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Ingår i: Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association. - : Elsevier BV. - 1532-8511. ; 30:1
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Tidskriftsartikel (refereegranskat)abstract
- There is a paucity of knowledge in the literature relating to the extent of clot burden and stroke etiology. In this study, we measured the Extracted Clot Area (ECA) retrieved during endovascular treatment (EVT) and investigated relationships with suspected etiology, administration of intravenous thrombolysis and recanalization.As part of the multi-institutional RESTORE registry, the ECA retrieved during mechanical thrombectomy was quantified using ImageJ. The effect of stroke etiology (Large-artery atherosclerosis (LAA), Cardioembolism, Cryptogenic and other) and recombinant tissue plasminogen activator (rtPA) on ECA and recanalization outcome (mTICI) was assessed. Successful recanalization was described as mTICI 2c-3.A total of 550 patients who underwent EVT with any clot retrieved were included in the study. The ECA was significantly larger in the LAA group compared to all other etiologies. The average ECA size of each etiology was; LAA=109mm2, Cardioembolic=52mm2, Cryptogenic=47mm2 and Other=52mm2 (p=0.014*). LAA patients also had a significantly poorer rate of successful recanalization (mTICI 2c-3) compared to all other etiologies (p=0.003*). The administration of tPA was associated with a smaller ECA in both LAA (p=0.007*) and cardioembolic (p=0.035*) groups.The ECA of LAA clots was double the size of all other etiologies and this is associated with a lower rate of successful recanalization in LAA stroke subtype. rtPA administration prior to thrombectomy was associated with reduced ECA in LAA and CE clots.
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| 18. |
- Fujioka, Masayuki, et al.
(författare)
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A Mismatch Between the Abnormalities in Diffusion- and Susceptibility-Weighted Magnetic Resonance Imaging May Represent an Acute Ischemic Penumbra with Misery Perfusion
- 2013
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1532-8511 .- 1052-3057. ; 22:8, s. 1428-1431
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Tidskriftsartikel (refereegranskat)abstract
- Susceptibility-weighted imaging (SWI) has recently attracted attention for its ability to investigate acute stroke pathophysiology. SWI detects an increased ratio of deoxyhemoglobin to oxyhemoglobin in cerebral venous compartments, which can illustrate cerebral misery perfusion with a compensatory increase of oxygen extraction fraction in the hypoperfused brain. In this study we make the first case report of blunt cervical trauma leading to a stroke, demonstrating the disparity between diffusion-weighted imaging (DWI) and SWI changes, or DWI-SWI mismatch, in the acute ischemic brain. The area of mismatch between a smaller DWI cytotoxic edema and a larger SWI misery perfusion in our patient matured into a complete infarction with time. The DWI-SWI mismatch may signify the presence of an ischemic penumbra, and provide information about viability of the brain tissue at risk of potential infarction if without early reperfusion.
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| 19. |
- Hamre, Charlotta, et al.
(författare)
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Factors Associated with Level of Physical Activity After Minor Stroke
- 2021
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier. - 1052-3057 .- 1532-8511. ; 30:4
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: To explore factors from the acute phase, and after three and 12 months, associated with level of self-reported physical activity 12 months after a minor ischemic stroke with National Institutes of Health Stroke Scale (NIHSS) score ≤ 3 in persons 70 years or younger.MATERIALS AND METHOD: In this longitudinal cohort study patients were recruited consecutively from two stroke units. Activity level were measured with three sets of questions addressing the average number of frequency (times exercising each week), the average intensity, and duration (the average time), and a sum score was constructed. The association between physical activity 12 months after stroke and sociodemographic factors, NIHSS, body mass index, balance, and neuropsychiatric symptoms were explored using multiple linear regression.RESULTS: ) 0.0 (0.0, 1.0), and 20 % were female. Multiple linear regression analyses showed sick leave status at stroke onset, balance at three and 12 months, and anxiety, depression, apathy, and fatigue at 12 months to be factors associated with physical activity at 12 months after stroke.CONCLUSION: We found that pre-stroke sick leave, post-stroke balance, and neuropsychiatric symptoms were associated with the level of physical activity one year after minor stroke. This might be of importance when giving information about physical activity and deciding about post-stroke follow-up.
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| 20. |
- Ihle-Hansen, Håkon, et al.
(författare)
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Carotid Atherosclerosis and Longitudinal Changes of MRI Visual Rating Measures in Stroke Survivors : A Seven-Year Follow-Up Study
- 2021
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier. - 1052-3057 .- 1532-8511. ; 30:10
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: We aimed to assess longitudinal changes in MRI measures of brain atrophy and white matter lesions in stroke and transient ischemic attack (TIA) survivors, and explore whether carotid stenosis predicts progression of these changes, assessed by visual rating scales.MATERIALS AND METHODS: All patients with a first-ever stroke or TIA admitted to Bærum Hospital, Norway, in 2007/2008, were invited in the acute phase and followed for seven years. Carotid ultrasound was performed during the hospital stay. Carotid stenosis was defined as ≥50% narrowing of lumen. MRI was performed one and seven years after the index event and analyzed according to the visual rating scales Fazekas scale (0-3), Medial Temporal Lobe Atrophy (MTLA) (0-4) score, and Global Cortical Atrophy (GCA) scale (0-3). Patients with MRI scans at both time points were included in this sub-study.RESULTS: Of 227 patients recruited, 76 had both MRI examinations. Mean age 73.9±10.6, 41% women, and 9% had ≥50% carotid stenosis. Mean Fazekas scale was 1.7±0.9 and 1.8±1.0, mean MTLA score 1.0 ±1.0 and 1.7±1.0, and mean GCA scale score 1.4±0.7 and 1.4±0.6 after one and seven years, respectively. 71% retained the same Fazekas scale score, while 21% showed progression. Deterioration in GCA scale was seen in 20% and increasing MTLA score in 57%. Carotid stenosis was not associated with progression on Fazekas score, MTLA score or GCA scale.CONCLUSIONS: Three out of five showed progression on the MTLA score. Carotid stenosis was not associated with longitudinal change of visual rating scales.
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| 21. |
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| 22. |
- Johansson, Kristina, et al.
(författare)
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Factor XII Concentrations and Risk of Intracerebral Haemorrhage : A Prospective Case-Referent Study
- 2021
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier. - 1052-3057 .- 1532-8511. ; 30:3
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: In a previous pilot study, we found an association between high factorXII levels and risk of haemorrhagic stroke suggesting that factor XII is a risk markerfor intracerebral haemorrhage (ICH). The aim of this study was to further investigate the association between factor XII and risk of ICH in a larger population.Materials and Methods:This study was conducted as a prospective nested case-referent study. All participants underwent a health examination and blood sampling for factor XII analysis at baseline. Cases were defined as participants who were diagnosed with a first-ever ICH between 1985 and 2000. Two referents were matched to eachcase.Results:We identified 70 individuals withfirst-ever ICH and 137 matchedreferents who had undergone a health examination and donated blood samples Factor XII Concentrations and Risk of Intracerebral Haemorrhage. A Prospective Case-Referent Studybefore the ICH event. The mean age was 54 years, and 33% were women. The median time-to-event was 3.5 years (range 0.04 to 10.2 years). Conditional logistic regression showed no association between factor XII and risk of ICH, (odds ratio1.06 per SD; [95% confidence interval: 0.57–1.97] in a multivariable model).Conclusions: A previous finding of an association between high concentration of factor XII and risk of ICH could not be replicated in this larger study
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| 23. |
- Järemo, Petter, et al.
(författare)
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Platelets and inflammatory parameters do not affect long-term survival after acute stroke. Journal of Stroke and Cerebrovascular Diseases
- 2016
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 25:8, s. 1936-1938
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Tidskriftsartikel (refereegranskat)abstract
- RationaleAccording to literature, the inflammatory response and platelets are associated with coronary heart disease mortality. In this study, we examine if similar relationships exist after acute cerebral infarctions.DesignBetween 2005 and 2007, individuals (n = 61) hospitalized with acute stroke were investigated 2.1 ± .3 (SD) days after hospital admission. After 9.3 ± .7 (SD) years, 29 patients (age 79 ± 8 [SD]; 12 women) had died. They were compared with survivors (age 69 ± 9 [SD]; 9 women) with respect to inflammatory parameters and platelet features such as activity and reactivity.Results and conclusionInflammation and platelets at the acute event do not forecast long-term survival of stroke sufferers
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| 24. |
- Jönsson, Ann-Cathrin, et al.
(författare)
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Falls After Stroke : A Follow-up after Ten Years in Lund Stroke Register
- 2021
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1532-8511 .- 1052-3057. ; 30:6
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: To evaluate incidence of self-reported falls and associated factors in a ten-year perspective after stroke.METHODS: From a population-based cohort of first-ever stroke patients (n = 416) included in the Lund Stroke Register between March 1, 2001, and February 28, 2002, we performed a follow up of all 145 survivors ten years after stroke. We collected data on age, gender, main stroke type, living and housing situation, general health status (question 1 in the Short Form Health Survey (SF-36), dizziness, physical activity, Barthel Index, mobility aids, moving ability inside/outside, and health-related quality of life as defined by the EuroQol 3 dimension scale (EQ-5D-3L). Factors that may relate to falls were compared between those who had experienced falls after stroke or not.RESULTS: Ten years after stroke, 49 patients (34 %) reported falls and 96 patients (66 %) reported no falls. Compared to patients with no falls, those who reported falls were older (median age 83.3 years vs 75.6 years; p < 0.001), more often lived alone, were more dependent in daily living, had less physical activity, poorer general health status, more often needed mobility aids, were more often unable to move alone outside, and had poorer health-related quality of life in all items in EQ-5D-3L except pain/discomfort.CONCLUSIONS: Falls had occurred in approximately one third of the participants ten years after the stroke, and were strongly associated with several measures of frailty. Our results indicate that fall prevention should in particular focus on those at high risk of falls.
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| 25. |
- Jönsson, Ann-Cathrin, et al.
(författare)
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Secondary Prevention and Health Promotion after Stroke: Can It Be Enhanced?
- 2014
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1532-8511 .- 1052-3057. ; 23:9, s. 2287-2295
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Tidskriftsartikel (refereegranskat)abstract
- The aim was to study if health outcome and secondary prevention were satisfactory 1 year after stroke and if nurse-led interventions 3 months after stroke could have impact. Design was a randomized controlled open trial in a 1-year population. Primary outcome was health status 1 year after stroke. One month after stroke, survivors were randomized into intervention group (IG) with follow-up by a specialist nurse (SN) after 3 months (n = 232), and control group (CG) with standard care (n = 227), all to be followed up 1 year after stroke. At the first follow-up, patients graded their health, replied to the EuroQol-5 Dimensions (EQ-5D) health outcome questions, health problems were assessed, and supportive counseling was provided in the IG. Health problems requiring medical interventions were primarily referred to a general practitioner (GP). One year after stroke, 391 survivors were followed up. Systolic blood pressure (BP) had decreased in IG (n = 194) from median 140 to 135 (P = .05), but about half were above the limit 139 in both groups. A larger proportion (22%) had systolic BP >155 in the CG (n = 197) than in the IG (14%; P = .05). In the IG, 62% needed referrals compared with the 75% in the CG (P = .009). Forty percent in the IG and 52.5% in the CG (P = .04) reported anxiety/depression. In the IG, 75% and 67% in the CG rated their general health as fairly good or very good (P = .05). Although nurse-led interventions could have some effect, the results were not optimal. A more powerful strategy could be closer collaboration between the SN and a stroke clinician, before referring to primary care.
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| 26. |
- Karagianni, Alexia, et al.
(författare)
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Percutaneous atrial shunt closure and the risk of recurrent ischemic stroke : A register-based, nationwide cohort study
- 2023
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - Philadelphia : Elsevier. - 1052-3057 .- 1532-8511. ; 32:6
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Tidskriftsartikel (refereegranskat)abstract
- Background: According to the current guidelines, evidence of the effects of transcatheter closure in patients aged ≥60 years with an atrial shunt and cryptogenic stroke is still limited. Methods: Using Swedish health registries, patients aged ≥60 years who had previously developed a cryptogenic cerebrovascular event and undergone transcatheter closure were identified. Patients with atrial fibrillation were excluded, and the remaining patients were propensity score-matched with patients of the same age and risk profile who had only undergone medical treatment and with controls from the general population. They were then followed up until 2017 (mean period of 7.1 ±3.9 years). Results: In total, 100 patients of the intervention group were matched with 100 patients of the medical treatment group and with 100 controls and followed up. The hazard ratio for a recurrent ischemic stroke in the intervention group compared with the medical treatment group was 0.8 (95% confidence interval, 0.3–2.1), and that compared with the controls was 2.3 (95% confidence interval, 0.6–8.9). Atrial fibrillation occurred at the same rate in the two treatment groups (odds ratio, 0.8; 95% confidence interval, 0.4–1.7). However, patients in the intervention group developed vascular disease at a lower rate (odds ratio, 0.5; 95% confidence interval, 0.25–0.85). Conclusions: Patients aged ≥60 years with cryptogenic stroke may undergo transcatheter closure of an atrial shunt after thorough screening for other potential causes of stroke. © 2023 The Authors
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| 27. |
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| 28. |
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| 29. |
- Kong, Wan-Yee, et al.
(författare)
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Validation of Serial Alberta Stroke Program Early CT Score as an Outcome Predictor in Thrombolyzed Stroke Patients.
- 2017
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 26:10, s. 2264-2271
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The Alberta Stroke Program Early CT Score (ASPECTS) on baseline imaging is an established predictor of functional outcome in anterior circulation acute ischemic stroke (AIS). We studied ASPECTS before intravenous thrombolysis (IVT) and at 24 hours to assess its prognostic value.METHODS: Data for consecutive anterior circulation AIS patients treated with IVT from 2006 to 2013 were extracted from a prospectively managed registry at our tertiary center. Pre-thrombolysis and 24-hour ASPECTS were evaluated by 2 independent neuroradiologists. Outcome measures included symptomatic intracranial hemorrhage (SICH), modified Rankin Scale (mRS) at 90 days, and mortality. Unfavorable functional outcome was defined by mRS >1. Dramatic ASPECTS progression (DAP) was defined as deterioration in ASPECTS by 6 points or more.RESULTS: Of 554 AIS patients thrombolyzed during the study period, 400 suffered from anterior circulation infarction. The median age was 65 years (interquartile range (IQR): 59-70) and the median National Institutes of Health Stroke Scale score was 18 points (IQR: 12-22). Compared with the pre-IVT ASPECTS (area under the curve [AUC] = .64, 95% confidence interval [CI]: .54-.65, P = .001), ASPECTS on the 24-hour CT scan (AUC = .78, 95% CI: .73-.82, P < .001), and change in ASPECTS (AUC = .69, 95% CI: .64-.74, P < .001) were better predictors of unfavorable functional outcome at 3 months. DAP, noted in 34 (14.4%) patients with good baseline ASPECTS (8-10 points), was significantly associated with unfavorable functional outcome (odds ratio [OR]: 9.91, 95% CI: 3.37-29.19, P ≤ .001), mortality (OR: 21.99, 95% CI: 7.98-60.58, P < .001), and SICH (OR: 8.57, 95% CI: 2.87-25.59, P < .001).CONCLUSION: Compared with the pre-thrombolysis score, ASPECTS measured at 24 hours as well as serial change in ASPECTS is a better predictor of 3-month functional outcome.
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| 30. |
- Kragsterman, Björn, et al.
(författare)
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Carotid Endarterectomy Induces the Release of Inflammatory Markers and the Activation of Coagulation as Measured in the Jugular Bulb
- 2017
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 26:10, s. 2320-2328
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Tidskriftsartikel (refereegranskat)abstract
- Background and Purpose: Transient cerebral hypoxia may induce neuronal injury through an ischemia-reperfusion (I/R) response, with a subsequent activation of inflammation and coagulation-fibrinolysis. During carotid endarterectomy (CEA), the artery is clamped, which might impair the regional cerebral perfusion and initiate a local I/R response. Data suggest that the CD40-CD40 ligand dyad acts as a modulator in the induced activation. The aim of this study was to locally measure soluble CD40 ligand (sCD40L), in conjunction with inflammation and coagulation activation markers, during CEA.Subjects and Methods: This is a prospective study of 18 patients undergoing CEA. Blood samples from the venous jugular bulb (JB) and the radial artery (RA) were drawn at baseline and during the procedure. Measurements of sCD40L, interleukin-6 (IL-6), fragment 1 + 2 (F1 + 2), plasminogen activator inhibitor-1 (PAI-1), and D-dimer were analyzed. Comparisons during CEA were made between levels: baselines versus JB, JB versus RA, and sequential JB measurements. Fifty cardiovascular healthy patients were the reference group for the sCD40L baseline comparison.Results: Increased cerebral IL-6 levels were demonstrated throughout the procedure, as well as the temporal influence in F1 + 2, PAI-1, and D-dimer values. sCD40L remained unchanged throughout the procedure. This indicates a local cerebral inflammatory reaction together with an activation of coagulation-fibrinolysis, but it does not appear to primarily involve the CD40-CD40 ligand dyad.Conclusions: Signs of a local inflammatory reaction and activation of coagulation were observed during CEA, but levels of sCD40L remained stable, unaffected by carotid artery clamping and reperfusion.
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| 31. |
- Kucuk, Mutlu, et al.
(författare)
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The Effects of Lipopolysaccharide on the Disrupted Blood-Brain Barrier in a Rat Model of Preeclampsia
- 2018
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : ELSEVIER SCIENCE BV. - 1052-3057 .- 1532-8511. ; 27:12, s. 3411-3418
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Tidskriftsartikel (refereegranskat)abstract
- Background: Preeclampsia is a disorder characterized by high blood pressure and often proteinuria during pregnancy. It is known that a subseptic dose of bacterial lipopolysaccharide (LPS) induces production of proinflammatory cytokines, and possibly increasing the risk for developing preeclampsia. We investigated the effects of LPS on the blood-brain barrier (BBB) integrity in pregnant rats with N (omega)-nitro-L-arginine methyl ester (L-NAME) induced preeclampsia.Methods: Starting from the 10th day of gestation, pregnant rats were given L-NAME for 10 days to produce hypertension and proteinuria. Animals were then treated with a single injection of LPS on the 19th day of pregnancy. Arterial blood pressure and proteinuria were measured on the day of the experiment, which was 24 hours after the LPS injection. The BBB integrity was assessed by using Evans blue (EB) and horseradish peroxidase (HRP) tracers.Results: Proteinuria was observed in varying degrees, and the arterial blood pressure increased in L-NAME-treated pregnant rats (P < .01). The overall brain EB content did not increase in these preeclamptic rats when compared to pregnant animals, and LPS treatment also did not change EB content. Ultrastructurally, frequent vesicles containing HRP reaction products were observed in the capillary endothelial cells in the cerebral cortex and hippocampus of pregnant rats treated with L-NAME (P < .01). However, LPS did not change the amounts of HRP that mainly accumulated in brain capillary endothelial cells of these animals.Conclusion: Our results suggest that, in this experimental setting, LPS does not change the severity of BBB disruption observed in preeclamptic animals.
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| 32. |
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| 33. |
- Lind, Lars, et al.
(författare)
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A Multi-Cohort Metabolomics Analysis Discloses Sphingomyelin (32:1) Levels to be Inversely Related to Incident Ischemic Stroke
- 2020
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 29:2
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Tidskriftsartikel (refereegranskat)abstract
- Background and Purpose:To search for novel pathophysiological pathways related to ischemic stroke using a metabolomics approach.Methods: We identified 204 metabolites in plasma by liquid chromatography mass spectrometry in 3 independent population-based samples (TwinGene, Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS) and Uppsala Longitudinal Study of Adult Men). TwinGene was used for discovery and the other 2 samples were meta-analyzed as replication. In PIVUS, traditional cardiovascular (CV) risk factors, multiple markers of subclinical CV disease, markers of coagulation/fibrinolysis were measured and analyzed in relation to top metabolites.Results:In TwinGene (177 incident cases, median follow-up 4.3 years), levels of 28 metabolites were associated with incident ischemic stroke at a false discover rate (FDR) of 5%. In the replication (together 194 incident cases, follow-up 10 and 12 years, respectively), only sphingomyelin (32:1) was significantly associated (HR.69 per SD change, 95% CI.57-0.83, P value = .00014; FDR <5%) when adjusted for systolic blood pressure, diabetes, smoking, low density lipoportein (LDL)- and high density lipoprotein (HDL), body mass index (BMI) and atrial fibrillation. In PIVUS, sphingomyelin (32:1) levels were significantly related to both LDL- and HDL-cholesterol in a positive fashion, and to serum triglycerides, BMI and diabetes in a negative fashion. Furthermore, sphingomyelin (32:1) levels were related to vasodilation in the forearm resistance vessels, and inversely to leukocyte count (P < .0069 and .0026, respectively).Conclusions:An inverse relationship between sphingomyelin (32:1) and incident ischemic stroke was identified, replicated, and characterized. A possible protective role for sphingomyelins in stroke development has to be further investigated in additional experimental and clinical studies.
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| 34. |
- Lindblom, Rickard P F, 1981-, et al.
(författare)
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Hyperglycemia Alters Expression of Cerebral Metabolic Genes after Cardiac Arrest
- 2018
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 27:5, s. 1200-1211
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Tidskriftsartikel (refereegranskat)abstract
- Background: Survivors of cardiac arrest often experience neurologic deficits. To date, treatment options are limited. Associated hyperglycemia is believed to further worsen the neurologic outcome. The aim with this study was to characterize expression pathways induced by hyperglycemia in conjunction with global brain ischemia.Methods: Pigs were randomized to high or normal glucose levels, as regulated by glucose and insulin infusions with target levels of 8.5-10 mM and 4-5.5 mM, respectively. The animals were subjected to 5-minute cardiac arrest followed by 8 minutes of cardiopulmonary resuscitation and direct-current shock to restore spontaneous circulation. Global expression profiling of the cortex using microarrays was performed in both groups.Results: A total of 102 genes differed in expression at P<.001 between the hyperglycemic and the normoglycemic pigs. Several of the most strongly differentially regulated genes were involved in transport and metabolism of glucose. Functional clustering using bioinformatics tools revealed enrichment of multiple biological processes, including membrane processes, ion transport, and glycoproteins.Conclusions: Hyperglycemia during cardiac arrest leads to differential early gene expression compared with normoglycemia. The functional relevance of these expressional changes cannot be deduced from the current study; however, the identified candidates have been linked to neuroprotective mechanisms and constitute interesting targets for further studies.
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| 35. |
- Ludvigsson, Jonas F., 1969-, et al.
(författare)
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Risk of Stroke in 28,000 Patients with Celiac Disease : A Nationwide Cohort Study in Sweden
- 2012
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier. - 1052-3057 .- 1532-8511. ; 21:8, s. 860-867
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Tidskriftsartikel (refereegranskat)abstract
- Background: Earlier studies on stroke in celiac disease (CD) have been underpowered, but a recent study suggested that childhood CD is associated with a 10-fold increased risk of death from stroke, although it was based on small numbers. We examined the risk of stroke in patients with biopsy-verified CD.Methods: We collected biopsy data from all 28 pathology departments in Sweden and identified 28,676 individuals with CD diagnosed between 1969 and 2007 (Marsh 3: villous atrophy). In the main analyses, we used Cox regression to estimate hazard ratios (HRs) for stroke in patients with CD compared with HRs for stroke in 141,806 sex-and age-matched controls.Results: During follow-up, there were 785 first-stroke diagnoses in patients with CD and 2937 in reference individuals. Patients with CD were at increased risk of stroke (HR 1.10; 95% confidence interval [CI] 1.01-1.19). HRs were similar for ischemic stroke and brain hemorrhage and were not affected by adjustment for type 1 diabetes, rheumatoid arthritis, use of medication against hypertension, or dyslipidemia. The absolute risk of stroke in patients with CD was 267 per 100,000 person-years (excess risk 24/100,000). The highest risk estimates occurred in the first year, with virtually no increased risk after more than 5 years of follow-up after CD diagnosis. The HR for stroke in childhood CD was 1.10 (95% CI 0.37-3.22).Conclusions: Patients with CD are at only a small increased risk of stroke, which persists only for a brief period after diagnosis. CD does not seem to be a major risk factor for stroke.
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| 36. |
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| 37. |
- Magaard, Gustaf, et al.
(författare)
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Identifying unmet rehabilitation needs in patients after stroke with a graphic rehab-compassTM
- 2018
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier. - 1052-3057 .- 1532-8511. ; 27:11, s. 3224-3235
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Unmet rehabilitation needs are common among stroke survivors. We aimed to evaluate whether a comprehensive graphic "Rehab-Compass," a novel combination of structured patient-reported outcome measures, was feasible and useful in facilitating a capture of patients' rehabilitation needs in clinical practice.METHODS: A new graphic overview of broad unmet rehabilitation needs covers deficits in functioning, daily activity, participation, and quality of life. It was constructed by using 5 patient-oriented, well-validated, and reliable existing instruments with converted data into a 0 (worst outcome) to 100 (best outcome) scale but unchanged in terms of variable properties. Satisfaction of the Rehab-CompassTM was studied by a qualitative interview of 9 patients with stroke and 3 clinicians. Practical feasibility and capacity of the instrument were evaluated in a cross-sectionalstudy with 48 patients at 5-month follow-ups after subarachnoid hemorrhage.RESULTS: The Rehab-CompassTM identified and graphically visualized a panoramic view of the multidimensional needs over time which was completed before clinical consultation. The Rehab-CompassTM appeared to be feasible and time-efficientin clinical use. The interviews of both patients and clinicians showed high satisfaction when using the Rehab-CompassTM graph. In the studied stroke patients, the Rehab-CompassTM identified memory and processing information, fatigue, mood, and pain after subarachnoid hemorrhage as the most common problems.CONCLUSIONS: The graphic Rehab-CompassTM seems to be a feasible, useful, and time-saving tool for identification of unmet rehabilitation needs among stroke survivors in clinical practice. Further research is needed to make the Rehab-CompassTM more concise and evaluate the instrument among different stroke subgroups.
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| 38. |
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| 39. |
- Mustafa, S, et al.
(författare)
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Hyperthermia-induced vasoconstriction of the carotid artery and the role of potassium channels
- 2005
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 14:3, s. 122-126
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Tidskriftsartikel (refereegranskat)abstract
- Clinical experience and experimental studies have shown that hyperthermia can cause cerebral ischaemia and brain damage. By in vitro experiments with heating, we previously were able to induce carotid artery constriction. The objective of the present study was to clarify the mechanism of this thermal response. Isometric tension was recorded in rabbit carotid artery specimens using organ baths during stepwise temperature elevation. The heating responses were investigated at basal tone, in precontracted vessels, after blocking of adrenergic responses and administration of potassium (K)-channel activators and inhibitors. Stepwise heating of carotid artery strips from 37°C to 47°C induced reproducible graded contraction. The hyperthermic responses were not due to adrenergic stimulation, which were reduced and resistant to neurogenic blockade by tetrodotoxin. Heating-induced contractions were potentiated by the K-channel inhibitors tetraethylammonium, BaCl2, charybdotoxin, and the Na+/K+ ATPase inhibitor ouabain. Levcromakalim (BRL), a K+-channel activator, reduced heating induced contractions. Heating of carotid artery preparations induced reversible graded vasoconstriction proportional to temperature. The heating-induced contractions were not mediated by an adrenergenic process, but rather were due to inhibition of K+ channels, which increases Ca2+ entry. In vivo, this reaction may lead to a disturbance of autoregulation of cerebral blood flow and ischemia with brain damage. © 2005 by National Stroke Association.
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| 40. |
- Nylander, Ruta, et al.
(författare)
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Relation between cardiovascular disease risk markers and brain infarcts detected by magnetic resonance imaging in an elderly population
- 2015
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 24:2, s. 312-318
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Established cardiovascular risk markers, such as hypertension, are associated with increased risk of brain infarcts. The newer markers N-terminal pro-brain natriuretic peptide, troponin I, C-reactive protein, and cystatin C may affect the risk of cardiovascular events and potentially, thereby, also stroke. We investigated the association between established and new risk markers for cardiovascular disease and brain infarcts detected by magnetic resonance imaging (MRI) at age 75.METHODS: Four hundred six randomly selected subjects from the Prospective Investigation of the Vasculature in Uppsala Seniors study were examined with MRI of the brain at age 75. Blood samples, measurements, and dedicated questionnaires at age 70 were used for analysis of risk markers. A history of diseases had been obtained at age 70 and 75. MRI was evaluated regarding lacunar and cortical infarcts. Univariate associations between outcomes and risk markers were assessed with logistic regression models.RESULTS: One or more infarcts were seen in 23% of the subjects (20% had only lacunar infarcts, 1% had only cortical infarcts, and 2% had both). Hypertension (odds ratio [OR] 2.6, 95% confidence interval [CI] 1.4, 4.7) and obesity (OR 1.3; CI 1.0, 1.8) were significantly associated with increased risk of brain infarction. The newer risk markers were not significantly associated with the brain infarcts.CONCLUSIONS: The new markers were not associated with the predominantly lacunar infarcts in our 75-year-old population, why troponin I and NT-proBNP may be associated mainly with cardioembolic infarcts as shown recently.
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| 41. |
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| 42. |
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| 43. |
- Philp, Ian, et al.
(författare)
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Development of a Poststroke Checklist to Standardize Follow-up Care for Stroke Survivors
- 2013
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1532-8511 .- 1052-3057. ; 22:7, s. 173-180
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Tidskriftsartikel (refereegranskat)abstract
- Background: Long-term care for stroke survivors is fragmented and lacks an evidence-based, easy-to-use tool to identify persistent long-term problems among stroke survivors and streamline referral for treatment. We sought to develop a poststroke checklist (PSC) to help health care professionals identify poststroke problems amenable to treatment and subsequent referral. Methods: An instrument development team, supported by measurement experts, international stroke experts, and poststroke care stakeholders, was created to develop a long-term PSC. A list of long-term poststroke problem areas was generated by an international, multidisciplinary group of stroke experts, the Global Stroke Community Advisory Panel. Using Delphi methods, a consensus was reached on which problem areas on the list were most important and relevant to include in a PSC. The instrument development team concurrently created the actual checklist, which provided example language about how to ask about poststroke problem areas and linked patient responses to a specific referral process. Results: Eleven long-term poststroke problem areas were rated highly and consistently among stroke experts participating in the Delphi process (n = 12): secondary prevention, activities of daily living, mobility, spasticity, pain, incontinence, communication, mood, cognition, life after stroke, and relationship with caregiver. These problem areas were included in the long-term PSC. Conclusions: The PSC was developed to be a brief and easy-to-use tool, intended to facilitate a standardized approach for health care providers to identify long-term problems in stroke survivors and to facilitate appropriate referrals for treatment.
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| 44. |
- Rydell, Melissa, et al.
(författare)
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Maintained acute stroke admission during the first wave COVID-19 pandemic in Sweden : a register-based study
- 2022
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier. - 1052-3057 .- 1532-8511. ; 31:10
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: Clinicians and researchers have addressed concerns about the negative impact of COVID-19 outbreaks on the ability of health care systems to provide timely assessment and acute therapies to patients with stroke. The aim of this study is to describe stroke care during the first wave of the COVID-19 pandemic compared to the same period the year before at an acute care hospital in Sweden.Materials and Methods: In this cohort study data were collected from March 1st to August 31st in 2019 and 2020 on all patients diagnosed with stroke and TIA and registered at Danderyd Hospital in the national quality registry (Riksstroke). Data were completed with information from the hospital record. Sweden had no lockdown during 2020.Results: During the study period in year 2019 there were 426 registered stroke patients at Danderyd hospital, compared to 403 registered stroke patients the same period during 2020 (p = 0.483). The number of minor stroke and TIA during the period in 2019 compared to 2020 were 468 versus 453 respectively (minor stroke p = 0.475 versus TIA p = 0.50).Conclusions: There were no difference in the number of patients diagnosed with stroke and TIA during the first wave of the COVID-19 pandemic.
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| 45. |
- Saravanan, P., et al.
(författare)
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Application of Taguchi method to the optimization of detonation spraying process
- 2000
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Ingår i: Materials and Manufacturing Processes. - New York, NY, United States : Marcel Dekker Inc. - 1042-6914 .- 1532-2475. ; 15:1, s. 139-153
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Tidskriftsartikel (refereegranskat)abstract
- The present study deals with an application of the Taguchi method to the optimization of a detonation spray process for alumina coatings. Coating experiments were conducted using the Taguchi-fractional factorial (L8) design parametric study to optimize spray process parameters. The Taguchi design evaluated the effects of four detonation spray process parameters: acetylene to oxygen ratio, carrier gas flow rate, frequency of detonations and spray distance. The coating qualities evaluated were surface roughness, porosity, microhardness, and abrasion mass loss. The influence of process parameters on the as-sprayed coating qualities is discussed. The results of the study indicate that the higher fuel ratio and lower spray distance will result in higher hardness, lower porosity and lower abrasion mass loss. The Taguchi analysis employed in the present investigation led to optimized process parameters for the most abrasive wear resistant alumina coatings.
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| 46. |
- Schranz, Daniel, et al.
(författare)
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Fatty acid-binding protein 3 and CXC-chemokine ligand 16 are associated with unfavorable outcome in aneurysmal subarachnoid hemorrhage
- 2021
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier. - 1052-3057 .- 1532-8511. ; 30:11
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Tidskriftsartikel (refereegranskat)abstract
- Background: Aneurysmal subarachnoid hemorrhage (aSAH) is associated with activation of the inflammatory cascade contributing to unfavorable outcome and secondary complications, such as delayed cerebral ischemia (DCI). Both fatty acid-binding protein 3 (FABP3) and CXC-chemokine ligand 16 (CXCL-16) have been linked to vascular inflammation and cellular death. The authors aimed to assess the 30-day prognostic value of serum levels of FABP3 and CXCL-16 and explore their associations with DCI in aSAH patients.Methods: A total of 60 patients with aSAH were prospectively enrolled. Sampling for markers was done at 24 hours after the index event. FABP3 and CXCL-16 serum concentrations were determined by MilliPlex multiplex immunoassay method. The primary endpoint was unfavorable outcome at Day 30 based on the modified Rankin Scale.Results: Both FABP3 and CXCL-16 levels were significantly elevated in patients with unfavorable outcome compared to those with favorable outcome after aSAH (FABP3: 2133 pg/mL, IQR: 1053-4567 vs. 3773, 3295-13116; p<0.003 and CXCL-16: 384 pg/mL, 313-502 vs. 498, 456-62, p<0.001). The area under the curve (AUC) for serum CXCL-16 levels as a predictor of unfavorable outcome at Day 30 was 0.747 (95% CI =0.622-0.871; p<0.001). Based on binary logistic regression analysis, serum CXCL-16 with a cut-off level >446.7 ng/L independently predicted Day 30 unfavorable outcome with a sensitivity of 81% and a specificity of 62%. Neither CXCL-16 nor FABP3 showed a significant correlation with DCI.Conclusion: Early FABP3 and CXCL-16 levels are significantly associated with poor 30-day outcome in patients with aSAH.
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| 47. |
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| 48. |
- Sprigg, N., et al.
(författare)
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Early Recovery and Functional Outcome are Related with Causal Stroke Subtype : Data from the Tinzaparin in Acute Ischemic Stroke Trial
- 2007
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Ingår i: Journal of Stroke & Cerebrovascular Diseases. - : Elsevier BV. - 1052-3057 .- 1532-8511. ; 16:4, s. 180-184
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Tidskriftsartikel (refereegranskat)abstract
- Introduction: Baseline severity and causal subtype are predictors of outcome in ischemic stroke. We used data from the Tinzaparin in Acute Ischemic Stroke Trial (TAIST) to further assess the relationship among stroke subtype, early recovery, and outcome. Methods: Patients with ischemic stroke (<48 hours ictus) and enrolled into TAIST were included. Severity was measured prospectively as the Scandinavian Neurological Stroke Scale (SNSS) at days 0, 4, 7, and 10. Causal subtype as large artery atherosclerosis (LAA), cardioembolism (CE), or small vessel occlusion (SVO) was assigned after standard investigations. The rate of recovery was calculated as the change in SNSS at each time point. Functional outcome was assessed using the modified Rankin Scale (mRS) and Barthel Index at day 90. Results: Analyses were performed on the 1190 patients in TAIST who met criteria for LAA, CE, and SVO. The largest change in SNSS score occurred between baseline and day 4 and was greatest in SVO (median improvement 4 U), compared with LAA (median improvement 2 U) and CE (median improvement 2 U) (P < .0001). If no improvement in SNSS had occurred by day 4, irrespective of subgroup, then early recovery (median SNSS improvement by day 10: 2) and functional outcome (mRS 4) tended to be limited, patients who recovered early tended to continue to improve (median SNSS improvement by day 10: 11) and had a better outcome at day 90 (median, mRS 2). Conclusions: Recovery is related to causal subtype. In all subtypes most recovery occurred by day 4, and was predictive of longer-term functional outcome. © 2007 National Stroke Association.
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