1. Cohn, P.R.,et al. Ejection fraction and prognosis in cardiac surgery. Am. J. Cardiol.34: 140–141 (1974).
2. Martin, E.C., Shaver, J.A., Thompson, M.E.,et al. Direct correlation of external systolic time intervals with internal indices of left ventricular function in man. Circulation, SLIV, 419–431 (1971).
3. Mailhot, J.W., Sandley, H.; &Harrison, D.C. Left ventricular function following coronary bypass surgery. Circulation 44, Suppl. II, 196 (1971).
4. Rees, G., Bristow, J.D., Kremkau, E.L.,et al. Influence of aorto-coronary bypass surgery on left ventricular performance. New Eng. J. Med.284: 1116 (1971).
5. Boudoulas, H., Lewis, R.P., &Karayannacos, P.E. Effect of saphenous vein graft surgery upon left ventricular function. Am. J. Cardiol. (Abstract)31: 123 (1973).