[Myocardial bridging as an isolated angiographic change in the anterior descending branch of the left coronary artery].

Review of 1,900 cineangiograms revealed myocardial bridging in 15 patients. 6 patients with more than 75% systolic narrowing in LAD, no evidence of significant atherosclerotic coronary disease, and normal ventricular wall motion underwent further investigation which included clinical examination, ECG and exercise test. All patients suffered from uncharacteristic chest pain. Abnormal ECG showed no specific changes of ST segment. In 4 patients an exercise was positive. All investigated patients were treated with nifedipine. After 6 month therapy myocardial perfusion was evaluated by exercise radionuclide Th-201 myocardial scintigraphy. Normal perfusion was stated in 2 patients. In 4 others perfusion deficits were observed in LAD distribution. Exercise test repeated during therapy was positive in 2 of cases. Chest pain was less severe in all treated patients and Ecg became normal in 2 of them.