The heart is a muscular organ, slightly larger than your fist. It is located in your thorax, just behind the left side of your breastbone. The heart consists of four chambers: the left and right atria are located above, and the left and right ventricles are located below. The atria are mainly for volume function and the ventricles are mainly for pump function, so the ventricles are larger than the atria. The circulation of the heart begins in the right heart, where oxygen-rich venous blood enters the right atrium, enters the right ventricle, and enters the pulmonary artery, where carbon dioxide is expelled over the lungs and oxygen is absorbed. The oxygen-rich arterial blood enters the heart again, but this time into the left atrium, into the left ventricle, where it is pumped into the aorta and finally reaches the whole organism. What role does the heart valve play in this process? Wuhan Union Hospital cardiac surgery Hong Hao heart valve is located between the heart chambers, like a one-way open door, allowing blood to flow only in a certain direction in one direction, and can not reflux. Between the right atrium and the right ventricle is the tricuspid valve, between the left atrium and the left ventricle is the mitral valve, between the right ventricle and the pulmonary artery is the pulmonary valve, and between the left ventricle and the aorta is the aortic valve. The normal heart has two heart sounds, which are the sounds of the valves closing. The first heart sound is the sound of the mitral and tricuspid valves closing at the same time, and the first heart sound is the sound of the aortic and pulmonary valves closing at the same time. When a physician listens, he or she can hear an abnormal heart sound called a murmur. A valve that is inherently stiff, narrow or incompletely closed can produce a murmur when blood passes through it. Heart valve disease reduces the heart’s pumping function, and in order to compensate for the damaged and inefficient valves, the heart has to work harder to deliver arterial blood to organs and tissues. Overloading the heart can lead to failure, when symptoms such as shortness of breath, dizziness, chest pain, fatigue and edema occur. The above is to introduce you to the knowledge about heart valve disease from the overall perspective of heart blood circulation, I hope you can have a more in-depth and comprehensive understanding of heart valve disease. Wuhan Union Hospital cardiac surgery experts remind everyone, if you have the corresponding symptoms, please be sure to seek medical attention in a timely manner, do not delay the time of treatment.