Contraction and relaxation of the heart as muscle and pump.
D000818:Animals; D001783:Blood Flow Velocity; D001794:Blood Pressure; D003326:Coronary Circulation; D006321:Heart / Q000502:physiology*; D006352:Heart Ventricles / Q000033:anatomy & histology; D008322:Mammals; D009200:Myocardial Contraction; D013318:Stroke Volume; D013997:Time Factors; D014655:Vascular Resistance