Proximal left anterior descending (LAD) stenosis is a narrowing of the anterior ventricular branch vessels of the coronary arteries, in their proximity to the aorta. A stenosis in the left anterior descending branch indicates that coronary artery disease has developed. The lumen of the coronary artery is narrowed locally due to the accumulation of atherosclerotic plaque. Depending on the degree of stenosis, it can also be categorized as mild, moderate, or severe stenosis, which can also cause angina, panic, chest tightness, and other symptoms. The anterior descending branch is a vessel that runs along the left main trunk of the coronary artery along the interventricular groove, and the proximal segment is defined as near the direction of the aorta. When stenosis occurs, it can cause ischemia and hypoxic necrosis of the myocardium in the anterior, apical, and inferior walls of the left ventricle, causing symptoms such as chest pain, shortness of breath, and palpitations (a rapid heartbeat, often accompanied by panic). When stenosis of the proximal segment of the anterior descending branch occurs, it is recommended to consult a doctor in time and standardize the treatment under the guidance of a professional doctor.