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cardiac cycle

   Also found in: Medical, Legal, Encyclopedia, Wikipedia, Hutchinson 0.02 sec.
cardiac cycle
The rhythmic contraction (systole) and relaxation (diastole) of the chambers of the heart that corresponds to one heartbeat. During the cardiac cycle, blood is pumped out of the heart into the aorta and the pulmonary artery, and blood reenters the heart from the venae cavae and the pulmonary veins. The heart's valves open and close in response to pressure differences between the chambers.
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Noun1.cardiac cycle - the complete cycle of events in the heart from the beginning of one heart beat to the beginning of the next; an electrical impulse conducted through the heart muscle that constricts the atria which is followed by constriction of the ventricles; "the cardiac cycle can be shown on an electrocardiogram"
oscillation, cycle - a single complete execution of a periodically repeated phenomenon; "a year constitutes a cycle of the seasons"


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This sophisticated 3-D heart model offers more MRI/CT human heart detail with a reduced polygon count, full human heart cardiac cycle that includes cutaway interior views at great detail and two high resolution photorealistic exterior texture maps for both a lean and fatty heart derived from human heart digital photos.
Human Heart 3: Zygote Media Group, Inc by Patton, Carol / District Administration
It is postulated that in order for a life threatening arrhythmia to occur, the blunt trauma must come during "the electrically vulnerable" period of the cardiac cycle.
Sudden cardiac death in children and adolescents by Berger, Stuart / AMAA Journal
4]), which occur at specific times in the cardiac cycle as a result of abnormal cardiac mechanics.
Heart failure by Cahalin, Lawrence P. / Physical Therapy
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