period of isovolumic relaxation

period of isovolumic relaxation
a short interval (0.05 second) during ventricular diastole, immediately following the ejection period and lasting from semilunar valve closing to atrioventricular valve opening; as the muscle fibers relax, the ventricular pressure drops and the ventricular blood volume remains constant. See illustration at cardiac cycle, under cycle.

Medical dictionary. 2011.

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