ANATOMY

Detailed explanation-1: -The cardiac cycle is essentially split into two phases, systole (the contraction phase) and diastole (the relaxation phase). Each of these is then further divided into an atrial and ventricular component.

Detailed explanation-2: -Cardiac cycle events can be divided into diastole and systole. Diastole represents ventricular filling, and systole represents ventricular contraction/ejection. Systole and diastole occur in both the right and left heart, though with very different pressures (see hemodynamics below).

Detailed explanation-3: -Diastole consists of three phases: (1) active relaxation, (2) the conduit phase, and (3) atrial contraction.

Detailed explanation-4: -Each cardiac cycle has a diastolic phase (also called diastole) where the heart chamber is in a state of relaxation and fills with blood that receives from the veins and a systolic phase (also called systole) where the heart chambers are contracting and pumps the blood towards the periphery via the arteries.

Detailed explanation-5: -The heartbeat consists of two phases: diastole and systole. Diastole is the relaxation phase of the heartbeat. During this phase, the ventricles relax and blood flows through the left and right atria from the vena cava and pulmonary veins. Systole is the contraction phase of the heartbeat.