During which phase do the heart's ventricle chambers empty out all of their blood?

The systolic phase is the period during which the ventricles of the heart contract and pump blood out into the arteries. This contraction forces the blood out of the left ventricle into the aorta and out of the right ventricle into the pulmonary artery, effectively emptying the chambers of blood. The process is integral to the cardiac cycle, as it is responsible for maintaining circulation throughout the body.

In contrast, the diastolic phase is when the heart muscle relaxes and the ventricles fill with blood from the atria; during this time, the chambers are not emptying. The resting and recovery phases are not standard phases recognized in the cardiac cycle in relation to the ventricles emptying their blood. Understanding these distinctions is crucial for interpreting the dynamics of heart function during the EKG measurement process.