494 COMMUNICATIONS TO THE EDITOR CHEST, 76: 4, OCTOBER, 1979 6 Kleid JJ, Aryan SB, Martin C: Systolictime intervals in the syndrome of midsystolic click and late systolic murmur. Chest 71:85-69, 1977 7 Lewis EP, Rittgers SE, Forrester WF, et al: A critical review of the systolic time intervals. Circulation 56:146157, 1977 8 Wanderman KL, Goldberg MJ, Stack RS, et al: Left ventricular performanc...

Measurement of systolic time intervals is a valuable, non-invasive procedure to assess left ventricular performance, particularly when influenced by drugs. In this review, we discuss various factors affecting systolic time intervals, the therapeutic implications of the technique and its place among other non-invasive tests of cardiac function.