Linfen Zhao MD, Presenter: Nothing to Disclose

Li Yang MD, PhD, Abstract Co-Author: Nothing to Disclose

To evaluate the morphological characteristics of myocardial bridge-mural coronary artery (MB-MCA) and investigate the relationship between MB-MCA and the coronary atherosclerosis.

The images of 6729 patients with suspected or documented coronary artery disease who underwent 64-MDCT were analyzed retrospectively by 2 cardiovascular radiologists. When consistency was obtained by the independent interpretations, the diagnosis of MB-MCA could be confirmed. The length and diameter of MCA and thickness of MB were measured, and situation of MB, encasement form of MCA, adjacent vessel morphology and the distribution of atherosclerosis were observed.

Among 6729 patients, 1262 sites of MB-MCA were detected in 1214(18.04%)cases. 1145(90.7%) of MB-MCA were located on the LAD. MCA could be encased partially by MB(60.7%,766/1262) or covered completely (39.3%，496/1262）.The length of MCA was 18.57±9.02mm and the diameter of MCA less than distal vessel were found in 56.02% . The thickness of MB was 2.21±1.72mm. the proximal and/or distal segment to the MB-MCA show tortuous in 77.34% of the cases. The overall prevalence of coronary atherosclerosis of the proximal segment of MB-MCA was 49.75%, whereas the coronary artery atherosclerosis of MCA itself and the distal segment was 0.49% and 2.14%,respectively, which demonstrate significant difference.

64-MDCT could clearly detect the entire running course of coronary arteries and MB-MCA, which provide an accurate demonstration of the anatomical characteristics of MB-MCA.

the observation by 64-MDCT on myocardial bridge is very vividly than catheter angiography.

Zhao, L, Yang, L, Evaluation of Myocardial Bridge by 64 Multidetector CT in Coronary Artery Angiography.  Radiological Society of North America 2007 Scientific Assembly and Annual Meeting, November 25 - November 30, 2007 ,Chicago IL. http://archive.rsna.org/2007/5016383.html