Sunday, April 10, 2011

Ventricular Systole

Ventricular systole is the contraction of the muscles (myocardia) of the left and right ventricles by which blood is forced into the aorta and pulmonary artery during the cardiac cycle. However, the term usually describes the phase of left ventricle contraction. The contraction of myocardium induces conformational change of the muscle mass enabling expedient ejection of blood mass or mechanical systole. Ventricular systole is the origin of the pulse. The pulse is readily palpated at many points on the body and represents a universally accepted tactile (and sometimes visual) method of observing peak or systolic blood pressure.