Insufficient blood supply to the heart in young women refers to ischemia and hypoxia or necrosis of the heart muscle in young women due to narrowing or blockage of the coronary arteries. It manifests as chest tightness and chest pain, and the common types are angina pectoris and myocardial infarction. Insufficient blood supply to the heart refers to the contradiction between coronary blood supply and myocardial blood demand due to various reasons, so that the coronary blood flow cannot meet the needs of myocardial metabolism. 1.Reduction of myocardial blood supply and oxygen supply The direct cause of insufficient blood supply to the heart is atherosclerosis of coronary arteries, severe narrowing of the lumen, while the collateral circulation is not fully established and the blood supply is reduced or interrupted, resulting in severe and persistent ischemia of the myocardium and local ischemic necrosis of the myocardium. It mostly occurs in atherosclerotic coronary arteries, especially due to certain factors that cause atherosclerotic plaques to rupture and platelets to gather on the surface of the ruptured plaques, forming thrombi and blocking the lumen; or severe and persistent spasm of coronary arteries that interrupt blood flow. Other causes are coronary artery spasm, coronary artery embolism, aortic valve lesion, etc. can cause blood vessel narrowing, resulting in insufficient blood supply to the heart. 2.Increased myocardial oxygen demand A dramatic increase in myocardial oxygen consumption can lead to an imbalance in the ratio of blood supply to demand; overwork, excitement, cold, overeating, constipation, alcohol consumption, severe arrhythmia, and a sharp rise in blood pressure can all increase myocardial oxygen demand. Due to the increase of myocardial oxygen demand, myocardial blood supply also seems to be relatively insufficient. If a young woman has symptoms or an electrocardiogram suggesting possible myocardial ischemia, she should identify whether the change is functional or organic. Most young women with atypical symptoms or ECG changes often end up ruling out true myocardial ischemia after further evaluation, but it is important to note that the incidence of coronary heart disease has been trending younger in recent years, and young women with risk factors who suspect insufficient blood supply to the heart need to pay attention to it to avoid its development and deterioration.