Diastolic gallop

A normal adult heart beats with two heart sounds, called the first heart sound and the second heart sound. The galloping rhythm is an additional heart sound that appears after the second heart sound, and is a rhythm composed of the original first and second heart sounds. It resembles the sound of a horse's hoof touching the ground when a horse is running, so it is called the galloping law. According to the different time of running gallop, it can be divided into early diastolic galloping, late diastolic galloping and overlapping galloping rhythm. Among them, the early diastolic galloping rhythm is the most common. It appears after the second heart sound. Within seconds; late diastolic galloping occurs late, before the beginning of the systole, that is, 0.1 seconds before the first heart sound, so it is also called systolic galloping; when there is both early diastolic galloping and late diastolic The rhythm, plus the first and second heart sounds, sounds like four sounds occurring in parallel, also known as "four-tone rhythm" and "locomotive running horse rhythm." It is generally believed that early diastolic galloping is due to overload of ventricular diastole, decreased myocardial tension and decreased compliance, so that during ventricular diastole, blood filling causes wall vibration. Therefore, the presence of galloping law is an important sign of severe damage to the heart muscle.