Why the study?
Does the ratio of ejection time to isometric contraction time reflect changes in left ventricular performance in normal subjects and patients with nonvalvular heart disease?
Does the ratio of ejection time to isometric contraction time reflect changes in left ventricular performance in normal subjects and patients with nonvalvular heart disease?
Answers are grounded in this paper and cite their sources.
The ratio of ejection time to isometric contraction time serves as a useful physiological index for detecting changes in left ventricular performance.
Tension period, isometric contraction time and ejection time were measured in 20 normal subjects and 72 patients with nonvalvular heart disease to evaluate the usefulness of the duration of left ventricular systoles as an index of the ventricular performance. Left ventricular function could not be manifested with only one of those durations. The ratio of ejection time to isometric contraction time demonstrated a parallelism to changes in left ventricular performance. Serial observations of this ratio offer a convenient detection for the changes in left ventricular per-formance.
No takes yet. Share an insight, caveat, or question.
Hishimoto et al. (1968) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: