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cardiac cycle
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noun
one complete heartbeat, consisting of one contraction and relaxation of the heart.
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Words nearby cardiac cycle
cardholder, cardi-, cardia, cardiac, cardiac arrest, cardiac cycle, cardiac glycoside, cardiac massage, cardiac muscle, cardiac neurosis, cardiac output
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use cardiac cycle in a sentence
Scientific definitions for cardiac cycle
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.
The American Heritage® Science Dictionary
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