diastole

diastole /di·as·to·le/ (di-as´tah-le) the dilatation, or the period of dilatation, of the heart, especially of the ventricles.diastol´ic

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di·as·to·le (d-st-l)

n.

The normal rhythmically occurring relaxation and dilatation of the heart chambers, especially the ventricles, during which they fill with blood.

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dia·stolic (d-stlk) adj.

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diastole (dīas´tlē),

n 1. the rhythmic period of relaxation and dilation of a chamber of the heart during which it fills with blood.
n 2. the period after the contraction of the heart muscle, during which the aorta releases the potential energy stored in its elastic tissue. The energy is converted into kinetic energy and sustains the pressure necessary for steady flow of blood in the vessels. The pressure measured at this period is the lowest attained during the cardiac pumping cycle and is called the
diastolic pressure. The normal pressure in the adult is approximately 120/80 mm Hg (systolic/diastolic) and increases with age from 128/85 at 45 years of age to 135/89 at 60 years of age. See also blood pressure classification.

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diastole

the phase of the cardiac cycle in which the heart relaxes between contractions; specifically, the period when the two ventricles are dilated by the blood flowing into them. See also blood pressure and heart.