Also found in: Dictionary, Thesaurus, Medical, Wikipedia.


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 It might be outdated or ideologically biased.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 ?
It is more distinct when the heart is hypertrophous and dilated; and, under these circumstances, I have found the jogs correspond with the ventricular systole and diastole respectively, that of the diastole being sometimes nearly as strong as the other, and having the character of a receding motion suddenly arrested...
The three steady flow rates simulated onset ventricular systole (5L/min), mid-systole (15L/min), and peak systole (25 L/min) [10].
Ductus venosus wave form assessment methods Indices Method Consecutive cardiac event Pulsatility index Reflects deterioration in forward for vein cardiac function Systolic velocity Semi quantitative Cannot identify which component of - End diastolic forward cardiac function was velocity deteriorated (preload, contractility/compliance or afterload) Time average maximum velocity A-wave assessment Visual Impaired atrial contraction Velocity ratios S/v Forward flow into atria during end-systole v/D Ventricular relaxation D/a Ratio Passive and active diastolic filling S/D Ventricular systole and early diastolic filling S/a Ventricular systole and late diastole (active filling) v/a End-systole and late diastole (active filing)
Measured variables are left ventricular longitudinal length in systole (LVLS) and diastole (LVLD).
At 20 months of age, after about 18 months of ERT (without any side effects), echocardiography was repeated and demonstrated ejection fraction of 75%, interventricular septum diameter in systole of 7 mm (normal value=5-7 mm), interventricular septum diameter in diastole of 6.5 (normal value=4.5-6.5 mm), and posterior wall diameter of 7 mm (normal value=4.5-7 mm).
However, left ventriculography revealed apical ballooning akinesis with basal hyperkinesis during systole and reduced ejection fraction [Figure 2].
Pressure gradients were measured, followed by right ventricular angiography in lateral projection to measure the diameter of the pulmonary valve annulus in systole. The valvuloplasty balloon was centred on the annulus valve and inflated until complete resolution of the waist.
The concentric LV hypertrophy was the most important echocardiographic finding in HCM observed in present study leading to increased in thickening of walls, the left ventricular wall thickening during both diastole and systole was the main observation.
The highest level is at the peak systole of the first cardiac cycle t = 0.65 s.
(16) designed a new methodology based on fractal geometry that includes the creation of the concept of degrees of similarity, which allows the comparison of the fractal dimensions of the ventricular contours in systole, diastole and totality from images with a diagnosis of cardiac ventricular normality and severe abnormality.
Caption: Figure 4: Apical 2 chamber view with agitated saline captured at end systole showing basal and apical ballooning with preserved contractility of the mid ventricular segments.
Left ventricle obliteration during systole, visualized in the parasternal short axis view at the papillary muscle level, suggests hypovolemia (CHACKO & BRAR, 2014).

Full browser ?