atrial systole

The peak of the 'a' wave demarcates the end of atrial systole.

Back flow of blood through its opening during atrial systole is prevented by the Thebesian valve.

During atrial systole, blood flows from the atria to ventricles down the pressure gradient.

Atrial systole represents the contraction of myocardium of the left and right atria.

This holds true even during atrial diastole, when the pressure is significantly less than atrial systole.

This motion is called 'atrial systole'.

Atrial systole occurs late in ventricular diastole.

The second, "atrial systole," is when the atrium contracts, and blood flows from atrium to the ventricle.

(1) There are no atrial inlet valves to interrupt blood flow during atrial systole.

Even though the atrial systole comes before ventricular systole, all four chambers do diastole at the same time.

Atrial fibrillation represents a common electrical malady apparent during the time interval of atrial systole.

It is smaller at the end of atrial systole due to the contraction of the left atrium around it, like a sphincter.

The ECG shows atrial systole.

The Time variable of right atrial systole is tricuspid valve (TV) open to (TV) close.

Right atrial systole coincides with right ventricular diastole, driving the blood through the tricuspid valve into the right ventricle.

That is what makes the ventricular systole occur after atrial systole, and lets all the blood leave the atria before ventricle contracts (meaning squeeze).

Since the posterior ventricular wall is unable to expand, an increase in left ventricular volume with the atrial systole produces a marked displacement of the septum.

Loss of normal electrical conduction in the heart, as seen during atrial fibrillation, atrial flutter, and complete heart block, may abolish atrial systole.

(2) The atrial systole contractions are incomplete and thus do not contract to the extent that would block flow from the veins through the atria into the ventricles.

The PR-Interval is the space between atrial systole (P) and ventricular systole (QRS).

Left atrial contraction (left atrial systole) (during left ventricular diastole) causes added blood to flow across the mitral valve immediately before left ventricular systole.

During atrial systole, blood not only empties from the atria to the ventricles, but blood continues to flow uninterrupted from the veins right through the atria into the ventricles.

This reduction in annulus size at the end of atrial systole may be important for the proper coapting of the leaflets of the mitral valve when the left ventricle contracts and pumps blood.