to compare two expressions of the time constant for ventricular relaxation , 39 patients with various heart diseases ( six normal , six angina pectoris [ ap ] , 13 myocardial infarction [ mi ] , eight hypertrophic cardiomyopathy [ hcm ] , and six congestive cardiomyopathy [ ccm ] ) were studied .
C0018799
heart diseases
C0027051
myocardial infarction