Assessment of regurgitation fractions by radionuclide ventriculography.

The ratio A for left ventricular and right ventricular enddiastolic-endsystolic count differences was used for quantitative evaluation of aortic and mitral valve regurgitation. The mean value of A for patients without valvular insufficiencies was determined (Am = 1.43 +/- 0.27).23 (96%) of 24 patients with aortic or mitral valve regurgitation showed significantly increased A values (A greater than 2). The numerical value was used for classification of the degree of insufficiency and for comparison with angiography. The correlation between A and the average angiographic degree of insufficiency was 0.79.