Late diastolic running

Late diastolic gallop occurs late and occurs before the beginning of the systole, that is, 0.1s before the first heart sound, so it is also called presystolic gallop. Its mechanism is due to increased left ventricular pressure and decreased compliance in the end of diastole. The left atrium is caused by increased contraction in order to overcome the increased resistance to ventricular filling, so it is also called atrial gallop. Late diastolic gallops from the right atrium are rare.