Doppler-derived Aortic Flow Measurements During and After Heavy Isometric Exercise in Healthy Men Versus Men with Myocardial Infarction
Autor: | Amos Pines, Jaime Stroh, Jan J. Kellermann, Efraim Ben-Ari, Michael Motro, Yaacov Dory, Enrique Z. Fisman |
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Rok vydání: | 1992 |
Předmět: |
Male
medicine.medical_specialty Myocardial Infarction Blood Pressure Isometric exercise Doppler echocardiography Coronary artery disease Heart Rate Internal medicine Heart rate medicine Humans Radiology Nuclear Medicine and imaging Myocardial infarction Aorta medicine.diagnostic_test business.industry Stroke Volume Aortic flow Stroke volume Middle Aged medicine.disease Echocardiography Doppler Blood pressure Exercise Test cardiovascular system Cardiology Cardiology and Cardiovascular Medicine business Blood Flow Velocity |
Zdroj: | Journal of the American Society of Echocardiography. 5:219-224 |
ISSN: | 0894-7317 |
Popis: | Doppler echocardiography is a useful noninvasive determination of left ventricular function during dynamic exercise. Scarce data are available for the use of this technique during heavy isometric exercise. Therefore, Doppler-derived aortic flow indexes were assessed during and after 50% maximal upper-body isometric exercise in 25 healthy men (aged 47 +/- 6 years) and compared with those of 22 men (aged 48 +/- 9 years) who had suffered myocardial infarction. The heart rate increased (p = 0.01) in each of the groups from a mean of 68 +/- 12 at rest to 84 +/- 11 during isometric exercise. At rest, systolic blood pressure was higher (p = 0.05) in the patients with coronary artery disease. During exercise, the patients with cardiac disease, compared with the healthy volunteers, demonstrated a lesser reduction in flow velocity integral, stroke volume, and cardiac indexes (p = 0.001). Immediately on recovery, the patients with cardiac disease, compared with the healthy group, showed significantly greater (p = 0.001) increase in stroke volume and cardiac indexes. At 3 minute's recovery, the stroke volume index continued to increase in the patients with cardiac disease, while the healthy group showed a decrease to below its resting value. Although 50% of maximal upper-body isometric exercise caused similar heart rate and systolic blood pressure responses in healthy patients and patients with cardiac disease, there were significant group differences in Doppler-derived left ventricular systolic function indexes, which were greatest on immediate and 3 minute's recovery. The results suggest that this novel isometric test may be useful in clinical testing. |
Databáze: | OpenAIRE |
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