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contraction of the heart, during which blood is pumped into the aorta and the arteries that lead to the lungs
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the contraction of cardiac muscle, or the myocardium. A systole consists of separate but successive atrial and ventricular contractions. The cardiac cycle comprises consecutive systolic and diastolic movement. In man, 75 heart beats per minute are accompanied by atrial and ventricular systoles that last 0.1 sec and 0.3 sec, respectively. Blood enters the ventricles from the atria during atrial systole and is ejected into the vascular system during ventricular systole.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


The contraction phase of the heart cycle.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
"There's been a common belief that systolic blood pressure is the only one that matters," Flint said.
The participating clinicians successfully maintained patients in each of the treatment groups at close to their goal systolic blood pressures.
Patients with a single episode of systolic pressure lower than or equal to 110mmHg during the one-year period were twice as likely to experience a serious fall or faint.
In our study, GLS was reduced in 4% of the study population that correlated well with a reduced LV ejection fraction of < 30% indicating LV systolic dysfunction.
Mean and standard deviation (mean +- SD) were calculated for age, systolic and diastolic BP at 0, 2, 4 and 8 weeks.
We used independent sample f-test to analyze the mean difference in both systolic and diastolic blood pressure between each gender and between smoking statuses.
After four weeks, the investigators found that the group with 150 or greater baseline systolic blood pressure on just the DASH diet had an average of 11 mm Hg reduction in systolic blood pressure compared to a 4 mm Hg reduction in those solely on the DASH diet, but whose baseline systolic pressures were less than 130.
There was global left ventricular hypokinesia with severe systolic dysfunction (Ejection Fraction 20%).
NEW ORLEANS -- Uncontrolled systolic hypertension is a strong independent determinant of nocturia in middle-aged African American men, O'Neil Mason, MD, reported at the American Heart Association scientific sessions.
Thus, the use of regular and modular computational structures as cycle convolution and circular correlation having local and regular data communications can be very useful in obtaining a good VLSI implementation for DCT, IDCT [10-18], DST and IDST [20-23], discrete Fourier transform (DFT) [12] or discrete Hartley transform (DHT) [24-29] using both the systolic array architectural paradigm or distributed arithmetic [30-34].
The trial evaluated 448 patients with chronic heart failure and left ventricular systolic dysfunction.
In this sense, this study population may have a low risk of CVD, especially of systolic dysfunction, which can be a complication of microangiopathy and macroangiopathy.

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