systole (redirected from Systole and Diastole)

systole /sys·to·le/ (sis´to-le) the contraction, or period of contraction, of the heart, especially of the ventricles.systol´ic

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aborted systole  a weak systole, usually premature, not associated with pulsation of a peripheral artery.

atrial systole  the contraction of the atria by which blood is propelled from them into the ventricles.

extra systole  extrasystole.

ventricular systole  the contraction of the cardiac ventricles by which blood is forced into the aorta and pulmonary artery.

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sys·to·le (sst-l)

n.

The rhythmic contraction of the heart, especially of the ventricles, by which blood is driven through the aorta and pulmonary artery after each dilation or diastole. Also called miocardia.

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sys·tolic (s-stlk) adj.

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systole

[sis′təlē]

Etymology: Gk, systole, contraction

the contraction of the heart, driving blood into the aorta and pulmonary arteries. The occurrence of systole is indicated by the first heart sound heard on auscultation, by the palpable apex beat, and by the peripheral pulse. systolic, adj.

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systole (sis´tlē),

n the period of contraction of the heart. The term specifically designates the contraction of the ventricles, as distinguished from auricular contraction. It occurs with the first heart sound. The pressure from the systolic contractions is taken up and stored as potential energy by the elastic properties of the aorta and other great vessels of the arterial system. This storage of energy protects the smaller, more fragile vessels from undue pressure. The even flow and steady pressure of the blood are sustained by the controlled release of the potential energy stored in the arterial walls into kinetic energy for movement of the blood during the diastolic phase of heart function. The pressure recorded at the height of the ventricular contraction is the systolic pressure. In the adult the normal blood pressure is 120/80 mm Hg (systolic/diastolic). It rises with advancing age to 135/89 at 60 years of age. See also diastole; pressure, blood, stage; and pressure, systolic blood.

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systole

the contraction, or period of contraction, of the heart, especially of the ventricles, during which blood is forced into the aorta and pulmonary artery.

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atrial systole

contraction of the atria by which blood is forced into the ventricles; it precedes the true or ventricular systole.

extra systole

see extrasystole.

ventricular systole

contraction of the ventricles, forcing blood into the aorta and pulmonary artery.

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systole

Cardiology Contraction of the heart, generally understood to be ventricular, with ejection of blood from the right ventricle into the pulmonary arteries and from the left venticle into the aorta Signs of left ventricular systole 1^st heart sound, apical beat, arterial pulse. See Ejection fraction. Cf Diastole.