NURSING ANM AND GNM

Detailed explanation-1: -This period encompasses the ventricular relaxation and filling. Diastole represents when the blood vessels return blood to the heart in preparation for the next ventricular contraction. Systole begins when the mitral valve (or tricuspid) closes and concludes with the closure of the aortic valve (or pulmonic).

Detailed explanation-2: -During ventricular diastole, venous blood enters the left atrium, and when blood pressure within the left atrium exceeds blood pressure in the left ventricle, the mitral valve opens and passive filling of the ventricle occurs.

Detailed explanation-3: -Isovolumic relaxation: the period of ventricular relaxation when ejection ceases and pressure falls within the ventricles. During ventricular contraction, the atria relax (atrial diastole) and receive venous return from both the body and the lungs.