diastole
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tlˌi, -tl1570–80; < Late Latin diastolē < Greek diastolḗ a putting asunder, dilation, lengthening; compare diastéllein to set apart, equivalent to dia- dia- + stéllein to put, place
Based on the Random House Dictionary, © Random House, Inc. 2013.
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diastole (daɪˈæstəlɪ) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| Compare systole the dilatation of the chambers of the heart that follows each contraction, during which they refill with blood | |
| [C16: via Late Latin from Greek: an expansion, from diastellein to expand, from | |
| diastolic | |
| —adj | |
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| a pulsation of the heart, including one complete systole and diastole |
| any function of the body that is essential for life |
diastole di·as·to·le (dī-ās'tə-lē)
n.
The normal rhythmically occurring relaxation and dilatation of the heart chambers, especially the ventricles, during which they fill with blood.
di'a·stol'ic (dī'ə-stŏl'ĭk) adj.
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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| diastole (dī-ās'tə-lē) Pronunciation Key
The period during the normal beating of the heart in which the chambers of the heart dilate and fill with blood. Diastole of the atria occurs before diastole of the ventricles. Compare systole. diastolic adjective (dī'ə-stŏl'ĭk) |
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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diastole
in the cardiac cycle, period of relaxation of the heart muscle, accompanied by the filling of the chambers with blood. Diastole is followed in the cardiac cycle by a period of contraction, or systole (q.v.), of the heart muscle. Initially both atria and ventricles are in diastole, and there is a period of rapid filling of the ventricles followed by a brief atrial systole. At the same time, there is a corresponding decrease in arterial blood pressure to its minimum (diastolic blood pressure), normally about 80 mm of mercury in humans. Ventricular diastole again occurs after the blood has been ejected (during ventricular systole) into the aorta and pulmonary artery.
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