Common symptoms of myocardial ischemia include chest pain, palpitations (rapid heartbeat, often accompanied by panic), dyspnea, fatigue, and profuse sweating. Myocardial ischemia is a disease in which coronary blood flow is reduced for various reasons and the blood supply to the heart muscle is insufficient, causing a series of symptoms triggered by ischemia and hypoxia in the heart muscle cells. When myocardial ischemia occurs, myocardial cells become ischemic and hypoxic due to insufficient blood supply, which in turn leads to impaired heart function. Transient myocardial ischemia can cause angina pectoris, which manifests itself as chest pain, dyspnea, suffocation and other symptoms, which can be relieved to some extent when the blood supply to the heart is restored. When the coronary artery is severely narrowed or occluded, persistent myocardial ischemia can occur, and myocardial cells undergo ischemic necrosis, resulting in impaired cardiac function, which can be characterized by chest pain, panic, dyspnea, profuse sweating, and in severe cases, fainting and cardiac arrest. When myocardial ischemia occurs, it is recommended to consult a doctor in time and standardize the treatment under the guidance of a professional doctor.