cardiac cycle

American  

noun

1. one complete heartbeat, consisting of one contraction and relaxation of the heart.

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cardiac cycle Scientific  

1. 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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Example Sentences

See Examples For:

cardiac cycle

Mean arterial pressure, a measure of average blood pressure throughout the cardiac cycle, also decreased significantly.

From Science Daily ● Oct. 27, 2026

An individual is susceptible to commotio cordis for about 40 milliseconds of the cardiac cycle, contributing to the rarity of the condition.

From Washington Post ● Jan. 5, 2023

The human heart pumps blood through your body through a process known as a cardiac cycle.

From Salon ● Jan. 4, 2023

Subjects with lower mean arterial pressure, the average pressure in a cardiac cycle, or from beat to beat, had significant atrophy in the hippocampus, the brain’s memory center, as well as the thalamus and putamen.

From The Wall Street Journal ● Sep. 21, 2015

This is due to a very definite influence upon the different portions of the cardiac cycle.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" by Various

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