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Systole

For other uses, see Systolic geometry.
The cardiac cycle at the point of beginning a ventricular systole, or contraction: 1) newly oxygenated blood (red arrow) in the left ventricle begins pulsing through the aortic valve to supply all body systems; 2) oxygen-depleted blood (blue arrow) in the right ventricle begins pulsing through the pulmonic (pulmonary) valve en route to the lungs for reoxygenation.

Systole (/ˈsɪstəli/ SIST-ə-lee) is the part of the cardiac cycle during which some chambers of the heart contract after refilling with blood.[1]

  1. ^ Simmers, Louise (2004). Introduction to Health Science Technology. Australia: Thomson/Delmar Learning. p. 169. ISBN 9781401811280.

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