The aortic valve and mitral valve are both heart valves, of which the aortic valve is the heart valve connecting the left ventricle to the aorta and the mitral valve is the valve connecting the left atrium to the left ventricle. These two valves are like doors connecting different rooms, and the opening and closing of the valves ensures that blood flows in one direction. When the mitral valve is open, blood flows from the left atrium into the left ventricle due to the diastolic pumping action of the left ventricle and the contraction of the left atrium, when the aortic valve is closed. When the aortic valve is open, blood from the left ventricle is pumped into the aorta due to left ventricular contraction, when the mitral valve is closed. The sequential opening and closing of the mitral and aortic valves can ensure smooth blood circulation. If the mitral or aortic valves are diseased and become narrowed or incompletely closed, this can lead to an increased load on the heart, resulting in a series of adverse consequences.