LAD refers to the left anterior descending branch of the coronary artery; myocardial bridges in the middle of the left anterior descending branch of the coronary artery are not necessarily dangerous, depending on whether the patient has obvious clinical symptoms and whether they are combined with other cardiac diseases. 1. If the patient has no obvious clinical symptoms and no other heart disease, it is generally not dangerous and can continue to be observed. 2. The patient has developed appropriate clinical symptoms, such as angina pectoris, but has no other heart disease. If angina pectoris recurs or even leads to myocardial infarction, there is a certain risk of death, which should be treated under the guidance of a doctor by taking drugs such as nitroglycerin under the tongue or by thrombolysis or cardiac stent placement surgery. 3. Patients with obvious clinical symptoms, and accompanied by other heart diseases, especially leading to arrhythmia, myocardial infarction, the risk of death is relatively large, and should be treated in a timely manner. Those with myocardial bridges in the left anterior descending branch of the coronary artery should go to the cardiovascular medicine department of the hospital in time and take appropriate treatment measures under the guidance of the doctor.