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presystole

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Presystolic
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sys⋅to⋅le

  [sis-tuh-lee, -lee]
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–noun
1. Physiology. the normal rhythmical contraction of the heart, during which the blood in the chambers is forced onward. Compare diastole.
2. Classical Prosody. the shortening of a syllable regularly long.
Origin:
1570–80; < Gk systol a drawing up, contraction, equiv. to sy- sy- + stol pressure, orig., garment, equipment, equiv. to stol- (n. deriv. of stéllein to send, place) + -ē fem. n. suffix; cf. diastole, systaltic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Presystolic
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Word Origin & History

systole 
"periodic contraction of the heart and arteries," 1578, from Gk. systole "contraction," from syn- "together" + stem related to stellein "to put, send" (see stall (n.1)).
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: pre·sys·to·le
Pronunciation: -'sis-t&-(")lE
Function: noun
: the interval just preceding cardiac systole

Main Entry: sys·to·le
Pronunciation: 'sis-t&-(")lE
Function: noun
: the contraction of the heart by which the blood is forced onward andthe circulation kept up —compare DIASTOLE 1 —sys·tol·ic /sis-'täl-ik/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

presystole pre·sys·to·le (prē-sĭs'tə-lē)
n.
The interval in the cardiac rhythm immediately preceding systole.

pre'sys·tol'ic (-sĭ-stŏl'ĭk) adj.

systole sys·to·le (sĭs'tə-lē)
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.

sys·tol'ic (sĭ-stŏl'ĭk) adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
systole   (sĭs'tə-lē)  Pronunciation Key 
The period during the normal beating of the heart in which the chambers of the heart, especially the ventricles, contract to force blood into the aorta and pulmonary artery. Compare diastole.

systolic adjective (sĭ-stŏl'ĭk)
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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