Myocardial bridges can cause angina because the rare causes of coronary artery disease include congenital coronary artery malformation and coronary artery bridges, which are congenital abnormalities of blood vessel development and travel in the myocardium. The most common clinical cause of angina is coronary atherosclerosis, except for myocardial bridges, other rare causes, in addition to coronary embolism, entrapment aneurysm, coronary arteritis, syphilitic aortitis occurs in the coronary opening, trauma, and metabolic disease, diabetes, amyloidosis and resulting coronary artery lesions.