Myocardial bridge analysis by multidetector computed tomography and its association with coronary atherosclerosis

Abstract

Abstract Background Myocardial Bridging an inborn coronary abnormality, is defined as a segment of a major epicardial coronary artery, the tunneled artery, that goes intramurally through the myocardium beneath the muscle bridge. Objective To evaluate noninvasively the presence and distribution of atherosclerotic plaques in relation to myocardial bridge coronary segments and to determine the prevalence of myocardial bridges and their location and morphology by using MDCT. Patients and Methods The study population consisted of 55 patients presented with chest pain, referred for MDCT coronary angiography and found to have myocardial bridge at during the period from April 2018 and August 2019. 23 patients was found having Myocardial Bridge and coronary artery atherosclerotic plaques included in Group (A), 29 persons found having Myocardial Bridge without CAD included in Group (B). All patients were subjected to detailed history taking, clinical evaluation, ECG analysis and MSCT coronary angiography. Results In the present study, patients with atherosclerotic plaque (group A) (n = 29), mean age was 52.41 ± 10.55 years ranged from 35.0 to 73.0 years, 41.4% were males, while in Myocardial bridge without atherosclerotic lesion group (group B) (n = 26), mean age was 51.65 ± 7.58 ranged from 38.0 to 65.0 years., 30.8% were males. Conclusion Our study showed that diabetes mellitus and dyslipidemia are a significant risk factor for developing atherosclerotic plaque in the segment proximal to myocardial bridge. Myocardial bridge were usually located over the Mid segment of the left anterior descending coronary artery