isometric period of cardiac cycle

i·so·met·ric pe·ri·od of car·di·ac cy·cle

that period in which the muscle fibers do not shorten although the cardiac muscle is excited and the pressure in the ventricles rises, extending from the closure of the atrioventricular valves to the opening of the semilunar valves (isovolumic constriction) or the reverse (isovolumic relaxation).
Synonym(s): isovolumic period
Farlex Partner Medical Dictionary © Farlex 2012

i·so·met·ric pe·ri·od of car·di·ac cy·cle

(ī'sō-met'rik pēr'ē-ŏd kahr'dē-ak sī'kĕl)
That duration of time in which the muscle fibers do not shorten although the cardiac muscle is excited and the pressure in the ventricles rises, extending from the closure of the atrioventricular valves to the opening of the semilunar valves (isovolumic constriction) or the reverse (isovolumic relaxation).
Synonym(s): isovolumic period.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012