The heart is made up of myocardium, and the outermost part of the myocardium is covered with a membrane called epicardium, and under normal circumstances, the coronary arteries are distributed between the epicardium and the myocardium. In some people, a section of coronary artery grows into the myocardium, and the blood vessel is surrounded by muscles. Most myocardial bridges are congenital, that is, they are present from birth and are mostly asymptomatic, but in some people they can cause symptoms such as chest tightness, which is caused by the relative narrowing of blood vessels due to cardiac contraction, resulting in chest tightness. Myocardial bridges are found to exist in at least 50% of cases, and most of them are located in the middle part of the anterior descending branch (an important branch of the coronary artery), with the length of the bridges ranging from 1.0 to 2.5 cm and the thickness ranging from 0.5 to 7 mm. Myocardial bridges are classified into two types: superficial type: the thickness of the myocardium does not exceed 2 mm. Longitudinal type: the thickness of the myocardium is greater than 2 mm and is located in the deeper myocardium. (2) Clinical manifestations of myocardial bridges Superficial type: Because myocardial bridges are thin and short, they have less influence on coronary blood flow, and most of them can have no myocardial ischemic symptoms and corresponding ECG changes. Longitudinal type: Because the myocardial bridge is thick and long, it has a great influence on coronary blood flow, and angina pectoris and ST-T changes of myocardial ischemia appear on ECG. If myocardial bridge is complicated by coronary atherosclerosis secondary to thrombosis or plaque dislodgement, clinical symptoms of myocardial infarction and corresponding ECG changes may occur. Myocardial bridges are more likely to develop myocardial ischemia when combined with tachyarrhythmias. In addition, myocardial bridges have been associated with coronary artery disease, arrhythmias, stress cardiomyopathy, and sudden cardiac death. Diagnosis of myocardial bridges: The current methods of diagnosing myocardial bridges are mainly coronary CTA and coronary angiography. Treatment of myocardial bridges: Asymptomatic myocardial bridges found incidentally generally do not require special management. For symptomatic myocardial bridges and those with atherosclerotic plaques at myocardial bridges, pharmacological or surgical treatment can be used. 1, drug therapy for patients with angina symptoms, oral beta-blockers and calcium antagonists, such as verapamil (isoptin) and diltiazem may be effective, nitrates (cardiac pain, imodium, isoptin) and other ineffective, and can even aggravate the symptoms. 2.Surgical treatment should be performed if it is difficult to be controlled by drug treatment. In short, don’t be nervous after the diagnosis of myocardial bridge, just listen to the advice of the regular hospital doctors.