group 1 ( five hearts ; 280 +/- 20 gm . ) had no evidence of cardiac disease , group 2 ( five hearts ; 380 +/- 30 gm . ) had a history of systemic hypertension without clinical heart failure , and group 3 ( four hearts ; ; 590 +/- 40 gm . ) had both left ventricular overload and congestive failure .
C0018787
hearts
C0225897
left ventricular