AHA Coding Clinic® for ICD-9 - 1984 November - December

Myocardial Bridge

Myocardial bridge, congenital, 746.85. Code also any mention of chronic ischemic heart disease, 414.8. Myocardial bridge occurs when the heart muscle wraps around the coronary artery and constricts it. The bridge usually builds over the middle portion of the left anterior descending coronary artery. The myocardial bridge appears to be a congenital condition and its occurrence is higher in women than in men. There is increasing evidence that myocardial bridge patients may suffer from myocardial ischemia, myocardial infarction, ventricular fibrillation, conduction disturbances, and even sudden death. Changes in systemic arterial pressure and coronary perfusion pressure may significantly...

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