The location of the heart is the same for both men and women, it is located in the middle of the body to the left, in the lower left of the middle of the chest cavity, with a volume about the size of the patient’s own fist and a typical weight of 400-500 grams. The heart is composed of cardiac muscle cells and has four chambers, including the left atrium, left ventricle, right atrium and right ventricle; the left atrium connects to the left ventricle and the right atrium connects to the right ventricle, while the left ventricle connects to the aorta and the right ventricle connects to the pulmonary artery, without any interconnection between them, and is a joint and synergistic action of the body’s body circulation and pulmonary circulation. The role of the heart drives the flow of blood and ensures the function of blood supply to all organs of the body.