Determinants of stroke volume response to exercise in patients with mitral stenosis: A doppler echocardiographic study
| Autor: | Denise Martin, Michel Dahan, René Gourgon, Catherine Paillole |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
Male
medicine.medical_specialty Supine position Thermodilution Hemodynamics Doppler echocardiography Mitral valve Internal medicine Healthy control medicine Humans Mitral Valve Stenosis In patient cardiovascular diseases Exercise medicine.diagnostic_test business.industry Reproducibility of Results Stroke Volume Stroke volume Middle Aged medicine.disease Echocardiography Doppler Stenosis medicine.anatomical_structure Cardiology Exercise Test cardiovascular system Mitral Valve Female business Cardiology and Cardiovascular Medicine Blood Flow Velocity |
| Zdroj: | Journal of the American College of Cardiology. (2):384-389 |
| ISSN: | 0735-1097 |
| DOI: | 10.1016/0735-1097(93)90679-U |
| Popis: | Objectives. The aim of this study was to assess exercise-induced changes in stroke volume and their main determinants in mitral stenosis.Background. The mechanisms of the stroke volume response to exercise in mitral stenosis are not clearly established.Methods. Twenty-seven patients with mitral stenosis, aged 47 ± 13 years, and 10 healthy control subjects, aged 46 ± 11 years, were examined by Doppler echocardiography to obtain stroke volume, mitral velocity-time integral and calculated mitral valve area (by continuity equation) at rest and during submaximal supine bicycle exercise. Measured mitral valve area at rest and total mitral score were also obtained.Results. During exercise, stroke volume increased significantly (p < 0.001) in the control subjects (+25 ± 6%) but remained unchanged in the patients. In 10 patients (Group I), stroke volume increased by ≥14% (+23 ± 10%, p < 0.001); in the other 17 (Group II), it decreased or increased by |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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