The contraction phase of the cardiac cycle.
Contraction of the chambers of the heart; the myocardial fibers shorten, making the chamber smaller and forcing out blood.
A contraction of the heart, which pumps blood into the aorta.
A phase in the beating of the heart when it contracts as it pumps blood out.
Contraction of the heart, especially of the ventricles, driving blood into the aorta and pulmonary artery.
The portion of the heart cycle during which its chambers contract.
The period of the cardiac cycle during which the heart contracts. The term usually refers to ventricular systole, which lasts about 0.3 seconds. Atrial systole lasts about 0. 1 seconds.
The contraction of the heart. It alternates with the resting phase, known as diastole. The two occupy, respectively, about one-third and two-thirds of the cycle of heart action.
Contraction of the chambers of the heart. The myocardial fibers shorten, making the chamber smaller and forcing blood out. In the cardiac cycle, atrial systole precedes ventricular systole, which pumps blood into the aorta and pulmonary artery.
The contraction phase of a heart chamber, known as systole, alternates with a relaxation phase called diastole. Systole has two distinct stages: atrial and ventricular. During each heartbeat, the atria, or upper chambers, contract to push blood into the ventricles, the lower chambers. This is followed by ventricular systole, where the ventricles contract to propel blood into the arteries.
The first of the two sounds heard during a heartbeat is linked to systole and marks the closure of the valves separating the atria and ventricles. This closure prevents blood from flowing back into the upper chambers. The second sound corresponds to diastole and indicates the sealing of the aortic and pulmonary valves located at the outlets of the ventricles.
The phase of heart contraction; the actual contraction.