the economy of myocardial contraction ( ec ) was calculated by ( formula ; see text ) ec was 11.3 +/- 3.2 in normal and 14.3 +/- 4.7 dyn x s x g/cm2 x mu cal in dilative cardiomyopathic hearts ( ns ) .
C0878544
cardiomyopathic
C0018787
hearts