Quantitative Stress Echocardiography in Chronic Aortic and Mitral Regurgitation.

摘要: It was the purpose of present study to prove feasibility and reliability quantitative stress-echocardiography as an alternative method radionuclide angiography (RNA) in chronic regurgitant valvular lesions. Echocardiography RNA are most commonly used obtain various left ventricular (LV) morphometric functional parameters that have been postulated predict long-term prognosis patients with aortic mitral regurgitation. Supine bicycle ergometry a workload ranging from 25-250 Watts evaluate stress dependent LV volumes ejection fractions (EFs) pure (n = 18) regurgitation 14). Most (23/32) underwent simultaneous right heart catheterization. Echocardiographic EFs were validated by good correlations (r 0.81, P < 0.01). Patients class I/II (9), had significant increase EF during exercise (60%-67%, 0.001) reduction end-systolic volume (71-52 mL, In comparison, III symptoms drop (53%-49%, 0.01), larger baseline (104 NS), which did not decrease vs 107 NS). differ between (6) (8), however, mildly symptomatic increased 57%-67%, (P 0.01) versus (65% 69%, Stroke index different at (44 33 mL/m(2), NS); there differences (70 41 0.05). Quantitative is noninvasive safe RNA, allows reliable calculation EF. Determination may be additional prognostic value. The combination high low stroke inability improve might reflect early stages impaired function severe