Myocardial ischemia means that the blood in the heart is reduced, affecting the blood supply and oxygen supply of the heart. The energy of the myocardium cannot be supplied, the metabolism is abnormal, and the heart cannot work normally. The energy required for cardiac activity is almost entirely provided by aerobic metabolism, so the heart's blood demand at rest is also very high. If myocardial ischemia is caused by disease, it can lead to symptoms such as fatigue, angina or pain in the sternum and precordium, and coronary heart disease. It can also radiate to the left shoulder and left upper arm. Sometimes the condition may be severe, with signs of myocardial infarction such as sweating, nausea, and vomiting occurring.

Like all organs, the heart also needs blood to provide nutrients and oxygen, metabolites and carbon dioxide. The blood supplied to the heart enters the heart through the coronary arteries. There are two left and two right coronary arteries that escape from the root of the aorta and enter the heart. Because the heart continues to beat, it consumes too much oxygen and is overburdened. In the case of excessive physical exertion and mental stress, pulsating or contraction-like pain will appear in the back of the sternum or in the chest area, radiating to the left shoulder and left upper arm for several minutes. Patients with myocardial ischemia are prone to fatigue at work. Fatigue is not limited to one part of the body but is systemic.

When most people mention myocardial ischemia, they usually refer to coronary heart disease, especially angina pectoris, which to a large extent is coronary heart disease. Let’s first explain what coronary heart disease is, shall we? Coronary heart disease is the full name of atherosclerotic coronary heart disease of the heart. It refers to the stenosis or obstruction of hemangioma caused by coronary atherosclerosis. Myocardial ischemia refers to a pathological state in which the blood supply to the heart is reduced, resulting in reduced oxygen supply to the heart. Myocardial energy metabolism is normal and cannot support normal heart work. Coronary artery stenosis or occlusion caused by coronary atherosclerosis is the most important cause of myocardial ischemia. And the most common cause is myocardial ischemia and hypoxia.

The principle is similar to obstructive hypertrophic cardiomyopathy. The aortic valve acts as a doorway between the heart and the aorta. When the heart pumps blood into the aorta, the gate must be closed to prevent blood from flowing back into the heart.