[Echocardiographic and hemodynamic studies on the influence of verapamil in hypertrophic obstructive cardiomyopathy (author's transl)].

15 patients with obstructive hypertrophic cardiomyopathy were studied by m-mode echocardiography and 9 of them also by left heart catheterism before and after 10 mg Verpamil. The following results were obtained: 1. The systolic anterior movement (SAM) of the mitral valve was reduced (p less than 0.005), 2. the enddiastolic and endsystolic diameter were increased (p less than 0.02 and 0.05 respectively), 3. the EF-slope remained unchanged. 4. The left ventricular systolic pressure was reduced (p less than 0.025) and the gradient diminished from an average value of 58 to 34 mmHg (p less than 0.02), 5. heart rate and left ventricular enddiastolic pressure remained constant. The results of this acute study suggest a beneficial effect of Verpamil in patients with hypertrophic obstructive cardiomyopathy.