In general, the coronary artery vessels are aligned on the surface of the heart, while in some populations (incidence varies between 10%-40% in different reports), the coronary artery vessels are aligned in the sub-myocardium and are compressed by the myocardium during cardiac systole. This is congenital and the vast majority do not cause any ischemic symptoms. This is mainly because the heart spends one-third of its time in systole and two-thirds in diastole, and the compressed myocardial bridges are often not severely compressed. Of course, a very small number of myocardial bridges with severe compression and important location may lead to ischemic symptoms, which can lead to severe ischemic symptoms, and surgical release can be considered. Chongjian Li, Department of Cardiovascular Medicine, Fu Wai Hospital, Beijing, China