Angina pectoris

Angina pectoris is a clinical syndrome caused by insufficient blood supply to the coronary arteries, acute myocardium, temporary ischemia and hypoxia. It is characterized by paroxysmal thoracic squeeze pain, which can be accompanied by other symptoms. The pain is mainly located in the back of the sternum, and can radiate to the anterior heart area and the left upper limb. It often occurs during labor or emotional agitation for several minutes. It disappears after rest or with a nitrate preparation. This disease is more common in men. Most patients are over 40 years old. Exhaustion, emotional excitement, fullness, cold, rainy weather, and acute circulatory failure are common causes.