Apex cardiogram and systolic time intervals in acute myocardial infarction and effects of practolol.

Abstract

Systolic time intervals and the ratio of the height of the a wave on the apexcardiogram to the total height of the apexcardiographic deflection (a/H) derivedfrom simultaneous electrocardiogram, phonocardiogram, carotid pulse tracing, and apex cardiogram were recorded in 20 patients with uncomplicated acute myocardial in- farction and 6 patients with chest pain without acute myocardial infarction over a period of 5 days. Fifteen normal subjects were investigated on one occasion.