Wiggers, C.J. : Studies on the consecutive phases of the cardiac cycle. II. The laws governing the relative duration of ventricular systole and diastole. Am. J. Physiol., 56: 439, 1921.
2.
Weissler, A.M. , Harris, W.S., Schoenfeld, C.D.: Systolic time intervals in heart failure in man. Circulation, 37: 149, 1968.
3.
Weissler, A.M. , Harris, W.S., Schoenfeld, C.D.: Bedside technics for the evaluation of ventricular function in man. Am. J. Cardiol., 23: 577, 1969.
4.
Schroeder, J.S. , Popp, R.L., Stinson, E.B., et al.: Acute rejection following cardiac transplantation. Phonocardiographic and ultrasound observation. Circulation, 40: 155, 1969.
5.
Armstrong, T.C. , Lewis, B.S., Gotsman, M.S.: Systolic time intervals in constrictive pericarditis and severe primary myocardial disease. Am. Heart J., 85: 6, 1973.
6.
Lewis, B.S., Armstrong, T.G., Everson, R.C., et al.: Predictive value of the systolic time intervals in primary myocardial disease. Chest, 64: 431, 1973.
7.
Harris, W.S. , Schoenfeld, C.D., Weissler, A.M.: Effects of adrenergic receptor activation and blockade on the systolic pre-ejection period, heart rate and arterial pressure in man. J. Clin. Invest., 46: 1704, 1967 .
