21. Bennett DH, Evans DW: Correlation of left ventricular mass determined by echocardiography with vectorcardiographic and electrocardiographic voltage measurements. Br Heart J 36: 981, 1974 22. McFarland TM, Mohsin A, Goldstein S, Pickard SD, Stein PD: Echocardiographic diagnosis of left ventricular hypertrophy. Circulation 57: 1140, 1978 23. Savage DD, Drayer JIM, Henry WL, Mathews EC Jr, War...