| 1. |
- Ali, Zaheer, et al.
(författare)
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Intussusceptive Vascular Remodeling Precedes Pathological Neovascularization
- 2019
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Ingår i: Arteriosclerosis, Thrombosis and Vascular Biology. - : Lippincott Williams & Wilkins. - 1079-5642 .- 1524-4636. ; 39:7, s. 1402-1418
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Tidskriftsartikel (refereegranskat)abstract
- Objective—Pathological neovascularization is crucial for progression and morbidity of serious diseases such as cancer, diabetic retinopathy, and age-related macular degeneration. While mechanisms of ongoing pathological neovascularization have been extensively studied, the initiating pathological vascular remodeling (PVR) events, which precede neovascularization remains poorly understood. Here, we identify novel molecular and cellular mechanisms of preneovascular PVR, by using the adult choriocapillaris as a model.Approach and Results—Using hypoxia or forced overexpression of VEGF (vascular endothelial growth factor) in the subretinal space to induce PVR in zebrafish and rats respectively, and by analyzing choriocapillaris membranes adjacent to choroidal neovascular lesions from age-related macular degeneration patients, we show that the choriocapillaris undergo robust induction of vascular intussusception and permeability at preneovascular stages of PVR. This PVR response included endothelial cell proliferation, formation of endothelial luminal processes, extensive vesiculation and thickening of the endothelium, degradation of collagen fibers, and splitting of existing extravascular columns. RNA-sequencing established a role for endothelial tight junction disruption, cytoskeletal remodeling, vesicle- and cilium biogenesis in this process. Mechanistically, using genetic gain- and loss-of-function zebrafish models and analysis of primary human choriocapillaris endothelial cells, we determined that HIF (hypoxia-induced factor)-1α-VEGF-A-VEGFR2 signaling was important for hypoxia-induced PVR.Conclusions—Our findings reveal that PVR involving intussusception and splitting of extravascular columns, endothelial proliferation, vesiculation, fenestration, and thickening is induced before neovascularization, suggesting that identifying and targeting these processes may prevent development of advanced neovascular disease in the future.Visual Overview—An online visual overview is available for this article.
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| 2. |
- Bay, Annika, 1970-
(författare)
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Being physically active as an adult with congenital heart disease
- 2018
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Background: Due to advances in medical and surgical care adults with congenital heart disease (CHD) is a growing and aging population, that now outnumbers the children with CHD. In general, adults with CHD have reduced aerobic exercise capacity and nearly half of the patients do not reach current recommendations on physical activity. It is known that a low level of physical activity is associated with an increased risk for acquired cardiovascular disease. Studies has shown that adults with CHD are at the same, or even higher risk as the general population, for developing acquired cardiovascular disease.Aim: The overall aim was to explore physical activity in adults with CHD with respect to associated factors, exercise self-efficacy and their own experiences.Methods: This thesis is based on four papers. Paper I included 471 adults with CHD from three tertiary care centres in Sweden. The participants completed questionnaires measuring patient reported outcomes (e.g. SF-12) including physical activity level. Paper II was based on data from 79 adults with CHD from two tertiary care centers in Sweden and 42 matched controls. All participants completed questionnaires on exercise self-efficacy and quality of life, wore an activity monitor during four consecutive days and performed muscle endurance tests. Paper I and II were of cross-sectional design and analyses were done using logistic regression. In paper III and IV data were collected through structured interviews for 14 participants. They were asked about their experiences of being physically active (paper III), what they considered as physical activities, and their experiences of enablers and barriers to physical activity (paper IV). Qualitative content analysis was used in papers III and IV.Results: Physical activity level (paper I) and exercise self-efficacy (paper II) were strongly associated with age where those over 40 years had a lower level of physical activity and lower exercise self-efficacy. Further, in paper I, it appeared that patient reported outcomes from SF-12 were strongly associated with physical activity level. In paper II, exercise self-efficacy was associated with performance in a muscle endurance tests. Paper III revealed an overall theme – It´s like balancing on a slackline that illustrates how adults with CHD described themselves in relation to physical activity. This overall theme consisted of four themes: (1) Being an adventurer – enjoying the challenges of physical activity; (2) Being a realist – adapting to physical ability; (3) Being a non-doer – lacking prerequisites for physical activity and (4) Being an outsider – feeling excluded depending on physical ability. In paper IV, the analysis revealed a description of what adults with CHD consider to be physical activity and considered as enablers and barriers for physical activity. Four categories appeared; physical aspects, psychological aspects, psychosocial aspects and environmental aspects. In the psychosocial aspect, social support and encouragement in childhood to be physically active and no restrictions from e.g. parents, teachers and health care increased physical activity in adulthood.Conclusions: Age, social support and accepting physical limitations seem to have an important impact regarding physical activity level and exercise self-efficacy. In contrast, the complexity of CHD and other medical factors appear to be of less importance for adults with CHD in relation to physical activity. In order to support adults with CHD to increase their physical activity and reach their full potential, it is important to explore and consider the various aspects that may affect physical activity in this population.
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| 3. |
- Bay, Annika, et al.
(författare)
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Enablers and barriers for being physically active : experiences from adults with congenital heart disease
- 2021
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Ingår i: European Journal of Cardiovascular Nursing. - : Sage Publications. - 1474-5151 .- 1873-1953. ; 20:3, s. 276-284
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Tidskriftsartikel (refereegranskat)abstract
- Background: In general, adults with congenital heart disease have reduced exercise capacity and many do not reach the recommended level of physical activity. A physically active lifestyle is essential to maintain health and to counteract acquired cardiovascular disease, therefore enablers and barriers for being physically active are important to identify.Aim: To describe what adults with complex congenital heart diseases consider as physical activity, and what they experience as enablers and barriers for being physically active. Methods: A qualitative study using semi-structured interviews in which 14 adults with complex congenital heart disease (seven women) participated. The interviews were analysed using qualitative content analysis.Results: The analysis revealed four categories considered enablers and barriers - encouragement, energy level, approach and environment. The following is exemplified by the category encouragement as an enabler: if one had experienced support and encouragement to be physically active as a child, they were more positive to be physically active as an adult. In contrast, as a barrier, if the child lacked support and encouragement from others, they had never had the opportunity to learn to be physically active.Conclusion: It is important for adults with congenital heart disease to have the opportunity to identify barriers and enablers for being physically active. They need knowledge about their own exercise capacity and need to feel safe that physical activity is not harmful. This knowledge can be used by healthcare professionals to promote, support and eliminate misconceptions about physical activity. Barriers can potentially be transformed into enablers through increased knowledge about attitudes and prerequisites. © The European Society of Cardiology 2020.
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| 4. |
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| 5. |
- Bay, Annika, 1970-, et al.
(författare)
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Exercise self-efficacy (ESE) in adults with congential heart disease
- 2017
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Ingår i: European Heart Journal. - 0195-668X .- 1522-9645. ; 38:Suppl. 1
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Tidskriftsartikel (refereegranskat)abstract
- Background: Many adults with congenital heart disease (CHD) have reduced aerobic exercise capacity and impaired muscle function. However, it is largely unknown which factors have influence on the confidence to perform exercise training, i.e. Exercise Self-Efficacy (ESE).Aims: To identify factors related to low ESE, and thus identify potential targets for rehabilitation and thereby enhance the potential for being physically active.Methods: Seventy-nine adults with CHD; simple lesions n=38 (women n=16), complex lesions n=41 (women n=17) (mean age 36.7±14.6 years) and 42 age and sex matched controls were recruited. All participants completed questionnaires on ESE, quality of life (EQ-5D), and physical activity (international physical activity questionnaire, IPAQ), and performed muscle endurance tests.Results: ESE was categorised into low (<26 points, n=24) and high (≥26 points, n=55). Patients with low ESE were older (45.2±15.4 vs. 32.6±12.5 years, p=0.002), more often had prescribed medication (67% vs. 44%, p=0.06), higher New York Heart Association functional class (NYHA) (≥ III) (25% vs. 7%, p=0.03) and performed fewer shoulder flexions (30.9±16.1 vs. 45.9±23.9, p=0.01) compared with those with high ESE. In the high ESE group, ESE did not differ from controls (33.8±3.9 vs. 33.4±6.1, p=0.74). In linear multivariate analysis age (B;-0.18, 95% CI -0.28- -0.08), smoking (B;-3.73, 95% CI -7.17- -0.28), EQ-5Dindex <1 (B;-3.33, 95% CI -6.08- -0.57) and number of shoulder flexions (B; 0.09, 95% CI 0.03–0.16) were independently associated with ESE.Conclusion: Many adults with CHD have low ESE. Rehabilitation targeting quality of life, smoking cessation and muscle training may improve ESE, and thus enhance the potential for being physically active in this population.
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| 6. |
- Bay, Annika, et al.
(författare)
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Exercise self-efficacy in adults with congenital heart disease
- 2018
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Ingår i: International Journal of Cardiology: Heart and vasculature. - : Elsevier. - 2352-9067. ; 18, s. 7-11
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Tidskriftsartikel (refereegranskat)abstract
- Background: Physical activity improves health, exercise tolerance and quality of life in adults with congenital heart disease (CHD), and exercise training is in most patients a high-benefit low risk intervention. However, factors that influence the confidence to perform exercise training, i.e. exercise self-efficacy (ESE), in CHD patients are virtually unknown. We aimed to identify factors related to low ESE in adults with CHD, and potential strategies for being physically active.Methods: Seventy-nine adults with CHD; 38 with simple lesions (16 women) and 41 with complex lesions (17 women) with mean age 36.7 ± 14.6 years and 42 matched controls were recruited. All participants completed questionnaires on ESE and quality of life, carried an activity monitor (Actiheart) during four consecutive days and performed muscle endurance tests.Results: ESE in patients was categorised into low, based on the lowest quartile within controls, (≤ 29 points, n = 34) and high (> 29 points, n = 45). Patients with low ESE were older (42.9 ± 15.1 vs. 32.0 ± 12.4 years, p = 0.001), had more complex lesions (65% vs. 42%, p = 0.05) more often had New York Heart Association functional class III (24% vs. 4%, p = 0.01) and performed fewer shoulder flexions (32.5 ± 15.5 vs. 47.7 ± 25.0, p = 0.001) compared with those with high ESE. In a logistic multivariate model age (OR; 1.06, 95% CI 1.02-1.10), and number of shoulder flexions (OR; 0.96, 95% CI 0.93-0.99) were associated with ESE.Conclusion: In this study we show that many adults with CHD have low ESE. Age is an important predictor of low ESE and should, therefore, be considered in counselling patients with CHD. In addition, muscle endurance training may improve ESE, and thus enhance the potential for being physically active in this population.
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| 7. |
- Bay, Annika, 1970-, et al.
(författare)
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Facilitators and barriers for physical activity in adults with congenital heart disease
- 2018
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Ingår i: European Heart Journal. - : Oxford University Press. - 0195-668X .- 1522-9645. ; 39:suppl_1, s. 1120-1121
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Tidskriftsartikel (refereegranskat)abstract
- Background: A majority of adults with congenital heart disease (CHD) have reduced exercise capacity and do not reach the recommended level of physical activity. A physically active lifestyle is essential to maintain health and counteract acquired cardiovascular disease. This study illuminates aspects that may be relevant for performing physical activity.Purpose: To describe facilitators and barriers for physical activity in adults with CHD.Methods: Semi-structured interviews were performed individually with fourteen adults (age 19–68 years, women=7) with complex CHD. The interviews were analyzed using qualitative content analysis.Results: Aspects that may enable or inhibit physical activity were found in two domains; Facilitators and Barriers, which both consisted of four categories physical, psychological, psychosocial and environmental aspects (Table 1).
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| 8. |
- Bay, Annika, 1970-, et al.
(författare)
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It ́s like balancing on a slackline : A description from adults living with congenital heart disease
- 2018
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Ingår i: Cardiology in the Young. - : Cambridge University Press. - 1047-9511 .- 1467-1107. ; 28:Suppl. S1, s. S37-S37
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Tidskriftsartikel (refereegranskat)abstract
- Introduction: Several studies have shown that adults with congenital heart disease have reduced exercise capacity and do not reach the recommended daily level of physical activity. With this in view, it is of great importance to investigate how this population experiences physical activity. The aim of the study is to illuminate how adults with congenital heart disease describes themselves in relation to physical activity.Methods: Semi-structured interviews with fourteen adults with complex congenital heart disease were performed. Patients were recruited from the clinic waiting list, based on their scheduled follow up and diagnosis. Interviews were analysed by qualitative content analysis.Results: The overall theme It´s like balancing on a slackline illustrates how adults with congenital heart disease described themselves in relation to physical activity. The overall theme consists of four themes: Being an adventurer- enjoying the challenges of physical activity, Being a realist- adapting to physical ability, Beinga non-doer- lacking prerequisites for physical activity and Being an outsider- feeling excluded depending on physical ability.Conclusions: The descriptions on themselves as a physically active were not constant or one-dimensional and the descriptions varied during the interviews, related to different time periods in life. It meant that they could described themselves as being an adventurer liking tough challenges, but at the same time describing themselves as being a non-doer with uncertainty over their physical strength. The findings point out specific factors for adults with CHD that might constitute as obstacles, but also possibilities for being physically active.
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| 9. |
- Bay, Annika, et al.
(författare)
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It's like balancing on a slackline : A description of how adults with congenital heart disease describe themselves in relation to physical activity
- 2018
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Ingår i: Journal of Clinical Nursing. - : Wiley. - 0962-1067 .- 1365-2702. ; 27:15-16, s. 3131-3138
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Tidskriftsartikel (refereegranskat)abstract
- AIMS AND OBJECTIVES: To illuminate how adults with CHD describe themselves in relation to physical activity.BACKGROUND: Several studies have shown that adults with congenital heart disease (CHD) have reduced exercise capacity and do not reach the recommended daily level of physical activity. With this in view, it is of immense importance to investigate how this population experiences physical activity.DESIGN: Qualitative study with semi-structured interviews analysed with qualitative content analysis.METHODS: Semi-structured interviews were individually performed with fourteen adults (women=7, age 19-68 years) with complex CHD. Patients were purposively recruited from the clinic waiting list, based on a scheduled follow-up and diagnosis.RESULTS: The overall theme, It's like balancing on a slackline, illustrates how adults with CHD described themselves in relation to physical activity. This overall theme consisted of four subthemes: (1) Being an adventurer- enjoying the challenges of physical activity; (2) Being a realist- adapting to physical ability; (3) Being a non-doer- lacking prerequisites for physical activity; and (4) Being an outsider- feeling excluded depending on physical ability.CONCLUSIONS: Adults with CHD seem to have a diverse relationship to physical activity and it involves various aspects throughout the lifespan. The findings point out factors that might constitute as obstacles for being physically active, specific for people with chronic conditions like CHD. This highlights the importance of further exploring the hindering and facilitating factors for being physically active in order to get a deeper understanding of how to support adults with CHD to be physically active.RELEVANCE TO CLINICAL PRACTICE: Given the diverse relationship to physical activity, nurses have to further investigate the patients' relationship to physical activity, in order to support a healthy lifestyle. Nurses and allied health professionals should offer individualized exercise prescriptions and education about suitable physical activities in relation to physical ability. This article is protected by copyright. All rights reserved.
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| 10. |
- Bay, Annika, et al.
(författare)
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Patient reported outcomes are associated with physical activity level in adults with congenital heart disease.
- 2017
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Ingår i: International Journal of Cardiology. - : Elsevier BV. - 0167-5273 .- 1874-1754. ; 243, s. 174-179
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: In general, adults with congenital heart disease (CHD) have impaired exercise capacity, and approximately 50% do not reach current recommendations on physical activity. Herein we analysed factors associated with physical activity level (PAL) in adults with CHD by using patient-reported outcomes (PRO).METHODS: Patients with CHD (n=471) were randomly selected from the national register on CHD and categorized according to complexity of lesions - simple (n=172, 39.1±14.6years), moderate (n=212, 39±14.1years), and severe (n=87, 31.7±10.7years). Participants completed a standardized questionnaire measuring PRO-domains including PAL. Variables associated with PAL were tested in multivariate logistic regression.RESULTS: PAL was categorized into high (≥3 METs ≥2.5h/week, n=192) and low (≥3 METs <2.5h/week, n=279). Patients with low PAL were older (42.6 vs. 35.8years, p≤0.001), had more prescribed medications (51% vs. 39%, p=0.009), more symptoms (25% vs. 16%, p=0.02) and comorbidity (45% vs. 34% p=0.02). Patients with low PAL rated a lower quality of life (76.6 vs. 83.4, p<0.001), satisfaction with life (25.6 vs. 27.3, p=0.003), a lower Physical Component Summary score (PCS) (78.1 vs. 90.5, p<0.001) and Mental Component Summary score (MCS) (73.5 vs. 79.5, p<0.001). Complexity of heart lesion was not associated with PAL. The included PROs - separately tested in the model, together with age were associated with PAL.CONCLUSIONS: PCS and MCS are stronger associated with PAL than age and medical factors. The use of these PROs could therefore provide valuable information of benefit for individualized advice regarding physical activity to patients with CHD.
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