Systolic-Time Intervals

Abstract

Despite the early introduction of the measurement of the phases of the cardiac cycle, their clinical application received little attention until recent years. In large part, this delay can be attributed to the fact that the physiologic implications of the systolic-time intervals could not be validated until comparisons with direct measures of cardiac function could be made. It was only in the modern era of clinical physiology, when the technics of cardiac catheterization and ventriculography became clinically available, that the importance of these measurements could be appreciated. On the basis of studies in recent years, a new understanding of the . . .