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KMID : 0616619970030020689
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Journal of Soonchunhyang Medical College
1997 Volume.3 No. 2 p.689 ~ p.694
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Myocardial bridges in coronary angiography
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Abstract
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ACKGROUND: Myocardial bridging is defined as embedment of a segment of the coronary -tery into the myocardium so that during ventricular systole the segment of artery is compressed. he prevalance of myocardial bridges among consecutive patients undergoing coronary angiography tries between 0.5% and 16% with most studies reporting an incidence of less than 2%. Because ty studies is not reported about myocardial bridging in Korea, this study was done to establish ,e angiographic evidence of myocardial bridging in cineangiograms performed in the cardiac boratory of the Soonchunhang University
PATIENTS AND METHODS: In the 10-years period between 1987 and 1996, selective )ronary angiography was performed on 1079 patients at the Medical University of Soonchunhang ospitals. All studies were reviewed and patients were divided into three groups on the basis of te degree of systolic compression: Mild(1-30% systolic compression), Moderate(31-50% systolic )mpression), and Severe(51-100% systolic compression).
RESULTS: 1. 10 patients(0.93%) were found to have myocardial bridge. and 9 patients had ,stolic compression of the left anterior descending coronary artery and one patient had impression of the right coronary artery.
Cineangiograms of all 292 "normal" patients who had symptomes suggestive of angina pectoris ere reviewed and 7 patients(2.4%) were found to have myocardial bridging.
4 patients had mild myocardial bridge, 1 patient had moderate, and 5 patients had severe.
The ECG was normal in 4 patients, showed left ventricular hypertrophy in 5 patients, and howed atrial fibrillation. Treadmill exercise test was positive in 5 patients, and non-diadnostic st due to insufficient exercise capacity was 5 patients.
CONCLUSIONS: The angiographic incidence of myocardial bridges was noted 0.93% and most )mmon site is the left anterior descending artery.
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