| 1. |
- Brignole, Michele, et al.
(författare)
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Low-blood pressure phenotype underpins the tendency to reflex syncope
- 2021
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Ingår i: Journal of Hypertension. - 1473-5598. ; 39:7, s. 1319-1325
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: We hypothesized that cardiovascular physiology differs in reflex syncope patients compared with the general population, predisposing such individuals to vasovagal reflex.METHODS: In this multicohort cross-sectional study, we compared aggregate data of resting SBP, DBP, pulse pressure (PP) and heart rate (HR), collected from six community-based cohort studies (64 968 observations) with those from six databases of reflex syncope patients (6516 observations), subdivided by age decades and sex.RESULTS: Overall, in male individuals with reflex syncope, SBP (-3.4 mmHg) and PP (-9.2 mmHg) were lower and DBP (+2.8 mmHg) and HR (+5.1 bpm) were higher than in the general population; the difference in SBP was higher at ages above 60 years. In female individuals, PP (-6.0 mmHg) was lower and DBP (+4.7 mmHg) and HR (+4.5 bpm) were higher than in the general population; differences in SBP were less pronounced, becoming evident only above 60 years. Compared with male individuals, SBP in female individuals exhibited slower increase until age 40 years, and then demonstrated steeper increase that continued throughout remaining life.CONCLUSION: The patients prone to reflex syncope demonstrate a different resting cardiovascular haemodynamic profile as compared with a general population, characterized by lower SBP and PP, reflecting reduced venous return and lower stroke volume, and a higher HR and DBP, suggesting the activation of compensatory mechanisms. Our data contribute to a better understanding why some individuals with similar demographic characteristics develop reflex syncope and others do not.VIDEO ABSTRACT: http://links.lww.com/HJH/B580.
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| 2. |
- Fedorowski, Artur, et al.
(författare)
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Twenty-five years of research on syncope
- 2023
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Ingår i: Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology. - 1532-2092. ; 25:8, s. 1-13
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Tidskriftsartikel (refereegranskat)abstract
- Over the last 25 years, the Europace journal has greatly contributed to dissemination of research and knowledge in the field of syncope. More than 400 manuscripts have been published in the journal. They undoubtedly improved our understanding of syncope. This symptom is now clearly differentiated from other forms of transient loss of consciousness. The critical role of vasodepression and/or cardioinhibition as final mechanisms of reflex syncope is emphasized. Current diagnostic approach sharply separates between cardiac and autonomic pathways. Physiologic insights have been translated, through rigorously designed clinical trials, into non-pharmacological or pharmacological interventions and interventional therapies. The following manuscript is intended to give the reader the current state of the art of knowledge of syncope by highlighting landmark contributions of the Europace journal.
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| 3. |
- Fedorowski, Artur, et al.
(författare)
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Underlying hemodynamic differences are associated with responses to tilt testing
- 2021
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 11, s. 1-6
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Tidskriftsartikel (refereegranskat)abstract
- Aim of this study was to explore whether differences in resting hemodynamic parameters may be associated with tilt test results in unexplained syncope. We analyzed age, gender, systolic (SBP), diastolic blood pressure (DBP) and heart rate (HR) by merging three large databases of patients considered likely to be of vasovagal reflex etiology, comparing patients who had tilt-induced reflex response with those who did not. Tilt-induced reflex response was defined as spontaneous symptom reproduction with characteristic hypotension and bradycardia. Relationship of demographics and baseline supine BP to tilt-test were assessed using logistic regression models. Individual records of 5236 patients (45% males; mean age: 60 ± 22 years; 32% prescribed antihypertensive therapy) were analyzed. Tilt-positive (n = 3129, 60%) vs tilt-negative patients had lower SBP (127.2 ± 17.9 vs 129.7 ± 18.0 mmHg, p < 0.001), DBP (76.2 ± 11.5 vs 77.7 ± 11.7 mmHg, p < 0.001) and HR (68.0 ± 11.5 vs 70.5 ± 12.5 bpm, p < 0.001). In multivariable analyses, tilt-test positivity was independently associated with younger age (Odds ratio (OR) per 10 years:1.04; 95% confidence interval (CI), 1.01–1.07, p = 0.014), SBP ≤ 128 mmHg (OR:1.27; 95%CI, 1.11–1.44, p < 0.001), HR ≤ 69 bpm (OR:1.32; 95%CI, 1.17–1.50, p < 0.001), and absence of hypertension (OR:1.58; 95%CI, 1.38–1.81, p < 0.001). In conclusion, among patients with suspected reflex syncope, younger age, lower blood pressure and lower heart rate are associated with positive tilt-test result.
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| 4. |
- Rivasi, Giulia, et al.
(författare)
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Age-related tilt test responses in patients with suspected reflex syncope
- 2021
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Ingår i: Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology. - : Oxford University Press (OUP). - 1532-2092. ; 23:7, s. 1100-1105
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Tidskriftsartikel (refereegranskat)abstract
- AIMS: Tilt testing (TT) is recognized to be a valuable contribution to the diagnosis and the pathophysiology of vasovagal syncope (VVS). This study aimed to assess the influence of age on TT responses by examination of a large patient cohort.METHODS AND RESULTS: Retrospective data from three experienced European Syncope Units were merged to include 5236 patients investigated for suspected VVS by the Italian TT protocol. Tilt testing-positivity rates and haemodynamics were analysed across age-decade subgroups. Of 5236 investigated patients, 3129 (60%) had a positive TT. Cardioinhibitory responses accounted for 16.5% of positive tests and were more common in younger patients, decreasing from the age of 50-59 years. Vasodepressor (VD) responses accounted for 24.4% of positive tests and prevailed in older patients, starting from the age of 50-59. Mixed responses (59.1% of cases) declined slightly with increasing age. Overall, TT positivity showed a similar age-related trend (P = 0.0001) and was significantly related to baseline systolic blood pressure (P < 0.001). Tilt testing was positive during passive phase in 18% and during nitroglycerine (TNG)-potentiated phase in 82% of cases. Positivity rate of passive phase declined with age (P = 0.001), whereas positivity rate during TNG remained quite stable. The prevalence of cardioinhibitory and VD responses was similar during passive and TNG-potentiated TT, when age-adjusted.CONCLUSIONS: Age significantly impacts the haemodynamic pattern of TT responses, starting from the age of 50. Conversely, TT phase-passive or TNG-potentiated-does not significantly influence the type of response, when age-adjusted. Vagal hyperactivity dominates in younger patients, older patients show tendency to vasodepression.
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| 5. |
- Rivasi, Giulia, et al.
(författare)
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AMBULATORY BLOOD PRESSURE MONITORING : A NEW DIAGNOSTIC APPROACH FOR DETECTION OF HYPOTENSION IN REFLEX SYNCOPE (SYNABPM 1 STUDY)
- 2022
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Ingår i: Journal of Hypertension. - : Ovid Technologies (Wolters Kluwer Health). - 1473-5598 .- 0263-6352. ; 40:Suppl 1, s. 10-10
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Konferensbidrag (refereegranskat)abstract
- OBJECTIVE: Diagnostic criteria for ambulatory blood pressure monitoring (ABPM) in patients with suspected reflex syncope are lacking. We hypothesized that patients with reflex syncope have a higher prevalence of systolic blood pressure (SBP) drops on ABPM. DESIGN AND METHOD: We conducted a retrospective analysis comparing ABPM data from reflex syncope patients and controls, matched by average 24-hour SBP, age, sex and hypertension. Patients with constitutional hypotension, orthostatic hypotension, predominant cardioinhibition or competing causes of syncope were excluded. Daytime and night-time SBP drops (<110, 100, 90, 80 mmHg) were assessed. Hypotensive susceptibility was defined likely or possible for cut-offs achieving the highest sensitivity among those with specificity > 90% and 80-90%, respectively. Findings were validated in an independent sample. RESULTS: In the Derivation cohort, daytime SBP drops were significantly more common in 158 syncope patients than 329 controls. One or more daytime drop < 90 mmHg provided the best diagnostic yield (91% specificity, 32% sensitivity, Odds Ratio [OR] = 4.6, p = 0.001). Two or more-daytime drops < 100 mmHg achieved 84% specificity and 40% sensitivity (OR = 3.5, p = 0.001). Results were confirmed in the Validation cohort: one or more daytime SBP drop < 90 mmHg provided 94% specificity and 29% sensitivity (OR = 6.2, p < 0.001), while two or more daytime SBP drops < 100 mmHg achieved 83% specificity and 35% sensitivity (OR = 3.5, p < 0.001). CONCLUSIONS: SBP drops during ABPM are more common in reflex syncope patients than in controls. Cut-off values that may be applied in clinical practice are defined. This study expands the current indications for ABPM to patients with reflex syncope.
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| 6. |
- Rivasi, Giulia, et al.
(författare)
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Association between hypotension during 24 h ambulatory blood pressure monitoring and reflex syncope : the SynABPM 1 study
- 2022
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Ingår i: European Heart Journal. - : Oxford University Press (OUP). - 1522-9645 .- 0195-668X. ; 43:38, s. 3765-3776
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Tidskriftsartikel (refereegranskat)abstract
- AIMS: Diagnostic criteria for ambulatory blood pressure monitoring (ABPM) in patients with suspected reflex syncope are lacking. The study hypothesis was that patients with reflex syncope have a higher prevalence of systolic blood pressure (SBP) drops on ABPM.METHODS AND RESULTS: ABPM data from reflex syncope patients and controls, matched by average 24 h SBP, age, sex, and hypertension were compared. Patients with constitutional hypotension, orthostatic hypotension, and predominant cardioinhibition during carotid sinus massage or prolonged electrocardiogram monitoring or competing causes of syncope were excluded. Daytime and nighttime SBP drops (<110, 100, 90, 80 mmHg) were assessed. Findings were validated in an independent sample. In the derivation sample, daytime SBP drops were significantly more common in 158 syncope patients than 329 controls. One or more daytime drops <90 mmHg achieved 91% specificity and 32% sensitivity [odds ratio (OR) 4.6, P < 0.001]. Two or more daytime drops <100 mmHg achieved 84% specificity and 40% sensitivity (OR 3.5, P = 0.001). Results were confirmed in the validation sample of 164 syncope patients and 164 controls: one or more daytime SBP drops <90 mmHg achieved 94% specificity and 29% sensitivity (OR 6.2, P < 0.001), while two or more daytime SBP drops <100 mmHg achieved 83% specificity and 35% sensitivity (OR 2.6, P < 0.001).CONCLUSION: SBP drops during ABPM are more common in reflex syncope patients than in controls. Cut-off values that may be applied in clinical practice are defined. This study expands the current indications for ABPM to patients with reflex syncope.
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| 7. |
- Rivasi, Giulia, et al.
(författare)
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Hypertension, hypotension and syncope
- 2022
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Ingår i: Minerva Medica. - 0026-4806. ; 113:2, s. 251-262
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Tidskriftsartikel (refereegranskat)abstract
- Hypertension and hypotension are strictly related phenomena, that frequently coexist within the spectrum of cardiovascular autonomic dysfunction, especially at advanced age. Indeed, antihypertensive treatment may predispose to orthostatic and post-prandial hypotension, while intensive blood pressure lowering may be responsible for systemic hypotension. Over recent years, systemic and orthostatic hypotension have emerged as important although often neglected risk factors for adverse outcomes, paralleling the widely recognized arterial hypertension. Both hypertension and hypotension are associated with detrimental effects on target organs and survival, thus significantly impacting patients' prognosis, functional autonomy and quality of life. Balancing low and high blood pressure requires accurate diagnostic assessment of blood pressure values and patients' hypotensive susceptibility, which allow for the development of customized treatment strategies based on individual hypo/hypertensive risk profile. The present review illustrates the complex interrelationship between hypotension and hypertension and discusses the relevant prognostic role of these conditions. Additionally, it provides an overview on hypotension detection and treatment in patients with hypertension, focusing on customized diagnostic and therapeutic strategies.
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| 8. |
- Rivasi, Giulia, et al.
(författare)
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Syncope : new solutions for an old problem
- 2021
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Ingår i: Kardiologia Polska. - 1897-4279. ; 79:10, s. 1068-1078
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Tidskriftsartikel (refereegranskat)abstract
- Syncope is a frequent event in the general population. Approximately 1%-2% of all emergency department admissions are due to syncope and at least one third of all people experience fainting in their life. Although consequences of cardiac syncope are generally feared, non-cardiac syncope is much more common and may be associated with severe injuries and quality of life impairment, particularly in older adults. Various diagnostic and therapeutic strategies have been created and implemented over decades, leading to significant improvements in diagnostic accuracy and treatment effectiveness. In recent years, diagnosis and treatment have further evolved according to an innovative approach focused on the hemodynamic mechanism underlying syncope, based upon the assumption that knowledge of syncope mechanism is a prerequisite for effective syncope prevention and treatment. Therefore, a new classification of syncope has been proposed, which defines two main syncope phenotypes with different predominant mechanisms: the hypotensive phenotype, where hypotension or vasodepression prevails, and the bradycardic phenotype, where cardioinhibition prevails. Identification of syncope phenotype - bradycardic or hypotensive/vasodepressive - represents the first step towards a personalized management of syncope, characterized by customized interventions for prevention. The present review is aimed at illustrating these new developments in diagnosis and therapy of non-cardiac syncope within a mechanism-based perspective. Diagnosis and therapy of bradycardic and hypotensive phenotypes are discussed, with a focus on recent evidence.
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| 9. |
- Sharad, Bashaaer, et al.
(författare)
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Twenty‐Four‐Hour Ambulatory Blood Pressure Profile in Patients With Reflex Syncope and Matched Controls
- 2023
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Ingår i: Journal of the American Heart Association. - 2047-9980. ; 12:8
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Tidskriftsartikel (refereegranskat)abstract
- BackgroundAmbulatory blood pressure (BP) monitoring has long been used to monitor BP in hypertension and lately emerged as a useful tool to detect hypotensive susceptibility in reflex syncope. However, hemodynamic characteristics in reflex syncope have not been sufficiently explored. The present study investigated the differences between ambulatory BP monitoring profiles associated with reflex syncope and normal population.Methods and ResultsThis is an observational study comparing ambulatory BP monitoring data from 50 patients with reflex syncope and 100 controls without syncope, age‐ and sex‐matched 1:2. Mean 24‐hour systolic (SBP) and diastolic BP, pulse pressure (24‐hour PP), dipping status, and number of daytime SBP drops ConclusionsPatients with reflex syncope have lower 24‐hour SBP but higher 24‐hour diastolic BP and more frequent daytime SBP drops
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| 10. |
- Torabi, Parisa, et al.
(författare)
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Early and late-onset syncope : insight into mechanisms
- 2022
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Ingår i: European Heart Journal. - : Oxford University Press (OUP). - 1522-9645 .- 0195-668X. ; 43:22, s. 2116-2123
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Tidskriftsartikel (refereegranskat)abstract
- AIMS: Unexplained syncope is an important clinical challenge. The influence of age at first syncope on the final syncope diagnosis is not well studied.METHODS AND RESULTS: Consecutive head-up tilt patients (n = 1928) evaluated for unexplained syncope were stratified into age groups <30, 30-59, and ≥60 years based on age at first syncope. Clinical characteristics and final syncope diagnosis were analysed in relation to age at first syncope and age at investigation. The age at first syncope had a bimodal distribution with peaks at 15 and 70 years. Prodromes (64 vs. 26%, P < 0.001) and vasovagal syncope (VVS, 59 vs. 19%, P < 0.001) were more common in early-onset (<30 years) compared with late-onset (≥60 years) syncope. Orthostatic hypotension (OH, 3 vs. 23%, P < 0.001), carotid sinus syndrome (CSS, 0.6 vs. 9%, P < 0.001), and complex syncope (>1 concurrent diagnosis; 14 vs. 26%, P < 0.001) were more common in late-onset syncope. In patients aged ≥60 years, 12% had early-onset and 70% had late-onset syncope; older age at first syncope was associated with higher odds of OH (+31% per 10-year increase, P < 0.001) and CSS (+26%, P = 0.004). Younger age at first syncope was associated with the presence of prodromes (+23%, P < 0.001) and the diagnoses of VVS (+22%, P < 0.001) and complex syncope (+9%, P = 0.018).CONCLUSION: In patients with unexplained syncope, first-ever syncope incidence has a bimodal lifetime pattern with peaks at 15 and 70 years. The majority of older patients present only recent syncope; OH and CSS are more common in this group. In patients with early-onset syncope, prodromes, VVS, and complex syncope are more common.KEY QUESTION: Does the age at which patients experience syncope for the first time impact the final syncope diagnosis?KEY FINDING: The first-ever syncope incidence has a bimodal lifetime pattern. The majority of older patients present recent syncope; orthostatic hypotension and carotid sinus syndrome are more common in this group. In patients with early-onset syncope, vasovagal and complex syncope are more common.TAKE-HOME MESSAGE: The age at first syncope impacts the final diagnosis. A detailed syncope history remains essential in elderly patients evaluated for syncope.
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