- Younger people have a highly distensible aorta, which expands during systole and minimises any subsequent rise in blood pressure.
- A newer classification scheme for heart failure is based not on left or right side failure but rather on whether the failure occurs during systole or diastole.
- The passive, elastic recoil between systoles maintains the blood pressure, smooths the flow of blood, and forces blood through the coronary arteries while the ventricles are filling.
- During systole, the rise from left ventricular end-diastole pressure to end-aortic diastolic pressure is decreased; thus the aortic valve opens earlier and stays open longer.
- The reflected wave returns to the aorta during systole rather than diastole, increasing systolic work even more and reducing diastolic pressure, on which coronary flow depends.