An explanation is provided about gallop rhythm a triple rhytem in diastole and can be heard by blood flow from the atria to the ventricles. Different kinds of heart sounds in the cardiac cycle are a venticular gallop, atrial gallop, and mid-diastsa gallop. A detailed description of their occurrence and mechanical production of third heart sound is given and factors which influence its occurrence and intensity are enumerated as being the atrial pressure, the degree of blood flow, the condition of the myocardium and to residual volume in the ventricle. Diagnosis of ventricular gallop is suggested by the age and the clinical setting in which it occurs. Its significance in children and adults has been given.