systole


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

systole

 [sis´to-le]
the contraction, or period of contraction, of the heart, especially of the ventricles, during which blood is forced into the aorta and pulmonary artery. adj., adj systol´ic.
atrial systole contraction of the atria by which blood is forced into the ventricles; it precedes the true or ventricular systole and is indicated by the fourth heart sound.
extra systole see extrasystole.
ventricular systole contraction of the ventricles, forcing blood into the aorta and pulmonary artery.

sys·to·le

(sis'tō-lē),
Contraction of the heart, especially of the ventricles, by which the blood is driven through the aorta and pulmonary artery to traverse the systemic and pulmonary circulations, respectively; its occurrence is indicated physically by the first sound of the heart heard on auscultation, by the palpable apex beat, and by the arterial pulse.
[G. systolē, a contracting]

systole

(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.

sys·tol′ic (sĭ-stŏl′ĭk) adj.

systole

Cardiology Contraction of the heart, generally understood to be ventricular, with ejection of blood from the right ventricle into the pulmonary arteries and from the left venticle into the aorta Signs of left ventricular systole 1st heart sound, apical beat, arterial pulse. See Ejection fraction. Cf Diastole.

sys·to·le

(sis'tŏ-lē)
Contraction of the heart, especially of the ventricles, by which the blood is driven through the aorta and pulmonary artery to traverse the systemic and pulmonary circulations, respectively; its occurrence is indicated physically by the first sound of the heart heard on auscultation, by the palpable apex beat, and by the arterial pulse.

systole

The period during which the chambers of the heart (the atria and the ventricles) are contracting. Atrial systole, in which blood passes down into the ventricles, precedes the more powerful ventricular systole in which blood is driven into the arteries. Systole alternates with a relaxing period called DIASTOLE.

systole

see HEART CARDIAC CYCLE.

sys·to·le

(sis'tŏ-lē)
Contraction of heart, especially of ventricles, by which blood is driven through aorta and pulmonary artery to traverse systemic and pulmonary circulations, respectively.
References in periodicals archive ?
In the first place, the motions of the heart may be seen and felt much more plainly and widely than usual, drawing in the intercostal spaces at each systole. Then these motions, instead of being, as usual intercepted by the expansion of the lung in a full inspiration, are always close to the walls of the chest; for these walls, instead of, as usual rising from the heart upwards and outward at each inspiration, carry the heart with them in all their movements.
However, these discontinuities are distinguishable only during the high velocities generated during peak systole, and it can be assumed that the flow patterns generated by water glycerol correspond to blood performance.
Pressure distribution and wall shear stresses are plotted when the flow is at a maximum at the peak systole in the first and the fifth cardiac cycle.
RV function was assessed quantitatively using echocardiographic analysis as percentage of change in cavity area from end diastole to end systole in apical four chamber view.
Echocardiogram revealed left ventricular dilation (diameter of 27 mm in systole and 36 mm in diastole), LVPW thickness of 9 mm and IVS thickness of 12 mm [Figure 1]a.
Droste and Rossen trade off verse and chorus in Mourning Sound, a deceptively upbeat tune that hints at both 1960s bubble gum and kraut-rock; Droste sings,"Let love age/and watch it burn out and die," while Rossen wakes up to the sounds of"distant shots and passing trucks." Taylor has his first Grizzly Bear lead vocal in the eerie Systole, which concludes,"You know that I lost that key that promised home." Even in the era of shuffle and playlists, 'Painted Ruins' is sequenced to be heard end-to-end, slowly gathering speed and heft as it proceeds from its withdrawn, moody opener, Wasted Acres, through the splashy finale, Sky Took Hold, which deploys flutes, saxophones, a simulated horn section and a tom-tom drumbeat like a Henry Mancini movie theme, only to crumble at the end.
(2,5) Thus, at systole, IOP rises by 1.5mmHg and CSF rises by 0.5mmHg; this maintains a pressure gradient that is higher within the eye compared to posteriorly, so allowing blood to flow down the pressure gradient, that is to say, out of the eye via the central retinal vein.
Further interrogation confirmed blood flow between the LV and the RA, consistent with an acquired Gerbode-type ventricular septal defect (VSD), with flow present in both systole and diastole.
A single cycle of cardiac activity can be divided into two basic phases--diastole and systole. Diastole represents the period of time when the ventricles are relaxed (not contracting).
For further evaluation, echocardiogram was done that showed appearance of trabeculations and deep intertrabecular recesses (Figure 2), blood flow from ventricular chamber into intertrabecular spaces on doppler imaging (Figure 3), systolic thickness of compacted layer less than 8 mm (Figure 3), and ratio of noncompacted to compacted layer of >2 at end of systole (Figure 3) as well as diastole (Figure 4) consistent with noncompaction.
Caption: Figure 3: (a) and (b): echocardiogram on day of admission showing the apical ballooning typical of TC in systole and diastole, respectively.

Full browser ?