In the past heart valve stenosis, the narrowing of the heart valve, was caused by rheumatic disease and most patients were young. Nowadays, the condition is due to the deterioration of the heart valve, and the older a patient, the more frequent the occurrence of heart valve stenosis.
The heart valve is an important component of the heart. As the heart beats, when blood travels through the heart, the heart valve prevents the blood from flowing backward. It serves as a door that opens and closed to control blood flow so the blood moves in one direction towards the lungs to be filled with oxygen before it travels through the circulatory system again. When there is a leak of the heart valve, the blood will flow backward. If the heart valve is narrow, blood has difficulty moving through the heart.