Ventricular stress exceeding arterial stress causes the aortic and pulmonary valves to open. These valves, referred to as the semilunar valves resulting from their half-moon form, stop backflow into the ventricles throughout ventricular diastole. This stress differential is the important issue governing their operate inside the cardiac cycle. For instance, when the left ventricle contracts, the stress inside it rises above the stress within the aorta, forcing the aortic valve open and permitting blood to circulation into systemic circulation.
Correct functioning of those valves is important for unidirectional blood circulation via the guts and into the circulatory system. Malfunctions, reminiscent of stenosis (narrowing) or insufficiency (leakage), can considerably impression cardiac efficiency and general well being. Understanding the mechanics of valve opening and shutting is essential for diagnosing and treating these situations. Traditionally, the examine of those valves has been pivotal in advancing cardiovascular drugs and surgical strategies.
