With the development of medicine, people will hear more and more unheard of names of diseases and feel very confused and nervous, for example, myocardial bridge has appeared frequently in recent years beside people’s ears and eyes, so what kind of disease is myocardial bridge: 1. Myocardial bridge is a congenital vascular malformation. This section of coronary artery covered by myocardial bridge is compressed during cardiac contraction, and systolic stenosis occurs, while coronary artery compression is lifted during cardiac diastole, and coronary stenosis is also lifted. 1960 postsmann and wig first described myocardial bridge under in vivo angiography. 2, the relationship between myocardial bridges and age, gender: myocardial bridges begin to exist from birth, and their development is closely related to the growth of adjacent arteries. The rate of myocardial bridges is slightly higher in males than in females, but some authors have concluded that there is no significant gender difference. 3, myocardial bridge site and number: myocardial bridge most often appears in the left anterior descending branch, and is mostly located between the proximal and middle 1/3 of the branch vessels, myocardial bridge can be single, but also multiple, multiple myocardial bridge can be located in the same vessel or different coronary arteries or their branches. 4, etiology; myocardial bridge is a more common congenital anatomical malformation. The cause of the myocardial segment of the coronary artery, myocardial bridge, especially the myocardial segment of the left anterior descending branch, can be squeezed during systole, and the symptoms of myocardial ischemia appear only after middle age. 5.Diagnosis: The diagnosis of myocardial bridge depends on coronary angiography and intracoronary Doppler and ultrasonography in addition to clinical symptoms and corresponding electrocardiographic changes. The diagnosis of myocardial bridges is difficult, superficial types are difficult to diagnose because of asymptomatic or mild symptoms, and even coronary angiography can only detect those longitudinal myocardial bridges. This explains why there is such a large difference in the detection rate of myocardial bridges in autopsy and coronary angiography.