Hypoxia-induced adaptation to mitral regurgitation: a role for K ATP channel up-regulation?
Gary D Lopaschuk, Jagdip S Jaswal
https://pubmed.ncbi.nlm.nih.gov/22133354Actively Recruiting
Led by Gazi University · Updated on 2026-02-06
40
Participants Needed
1
Research Sites
4 weeks
Total Duration
Heart valve diseases are a leading cause of illness and death after coronary artery disease, hypertension, and heart failure. Mitral stenosis narrows the heart's mitral valve, limiting blood flow and causing symptoms like shortness of breath, fatigue, and difficulty with physical activity. This condition also reduces exercise capacity, worsens quality of life, and impairs respiratory function. Research groups studying these effects often lack uniformity, and most focus on patients who have undergone a specific procedure called percutaneous mitral balloon valvuloplasty. The study compares patients who have had surgery for mitral stenosis to healthy individuals. It evaluates exercise capacity using a cardiopulmonary exercise test, muscle oxygenation with near-infrared spectroscopy, respiratory functions with spirometry, respiratory muscle strength and endurance with specialized devices, aortic stiffness with an arteriograph, physical activity with a multisensor monitor, and quality of life using the SF-36 questionnaire. Participants include a patient group and a healthy control group, with assessments done over about one year. Participants will undergo various tests to measure exercise capacity, muscle oxygenation, aortic stiffness, respiratory muscle strength and endurance, lung function, physical activity, and quality of life. These tests include exercise testing, respiratory measurements, and monitoring of daily activity levels. The study tracks these outcomes continuously through one year to understand differences between those who had mitral valve surgery and healthy people. This helps researchers learn how surgery affects heart and lung function as well as overall well-being.
CONDITIONS
Assessment of Exercise Capacity, Muscle Oxygenation and Aortic Stiffness in Patients With Mitral Stenosis
You may qualify if you...
You will not qualify if you...
Complete this quick 3-step screening to check your eligibility
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - Through study completion, an average of 1 year
Participants undergo assessments of exercise capacity, muscle oxygenation, aortic stiffness, respiratory muscle strength and endurance, pulmonary function, physical activity levels, and quality of life.
Initial evaluation and subsequent periodic assessments over 1 year
Duration - Through study completion, an average of 1 year
Participants are monitored over time to observe changes in exercise capacity, muscle oxygenation, aortic stiffness, respiratory function, physical activity, and quality of life.
Follow-up visits as scheduled throughout the study period
Total: 1 location
1
Gazi University Faculty of Health Sciences Department of Physiotherapy and Rehabilitation, Cardiopulmonary Rehabilitation Unit
Ankara, Çankaya, Turkey (Türkiye), 06490
Actively Recruiting
M
Meral BOŞNAK GÜÇLÜ, Prof. Dr.
E
Ebrar TÜLÜMENOĞLU, Pt
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
2
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