Clinical Anatomy Study Of Myocardial Bridge-mural Coronary Artery

Background and purpose:Under normal circumstances, the coronary artery and its branches in the adiposetissue of myocardial epicardial surface of the inner, coronary artery segments of walkingin between myocardial fibers, this section covered parietal coronary artery (Muralcoronary artery, MCA), the surface of myocardial called myocardial bridge (Myocardialbridge, MB)."MB-MCA" is a complex, clinical often referred to as "MB". In recentyears, with the development of myocardial bridge-mural coronary artery research, theirclinical significance has been clear: myocardial bridge-mural coronary artery can resultin myocardial ischemia, arrhythmias, and myocardial infarction. The rapid developmentof medical imaging technology especially expand the clinical application of multi-slicespiral CT, the myocardial bridge-mural coronary artery complex noninvasive detectionand diagnosis become possible, and early detection of atherosclerotic existence andcoronary myocardial bridge stenosis, significant selection and treatment of clinicaltreatment methods the. This study aims to coronary CT angiography of coronary arteryCT angiography, the detection rate, good parts; to evaluate the correlation of muralcoronary artery and coronary atherosclerosis, in order to provide the reference forclinical diagnosis and treatment of myocardial bridge and its related diseases.Methods:Select2009January~2011December our department325cases coronary CTimaging of cases, including male155cases, female170cases, age25~88years,average63.1years old. The use of Siemens16slice spiral CT,3D reconstruction or2Dcoronary artery trunk and its main branches, number of mural coronary artery and itspredilection site statistics, and mural coronary artery and atherosclerotic plaque data toanalyze its correlation of chi-square test with SPSS20.0software.Results:1. Mural coronary artery imaging detection rate of18.7%, the mural coronary occurs most frequently in the left anterior descending coronary artery middle (about75%), followed by the first diagonal branch of distal segment (about6.9%), then theleft anterior descending artery distal and intermediate branch proximal (about3.4%),and finally the proximal left anterior descending artery, the first diagonal branchmiddle, intermediate support of COSCO section and the circumflex artery COSCOsection (about1.7%).2. Coronary artery soft plaque occurs most frequently in the left anteriordescending coronary artery proximal segment (approximately23%), followed by theleft anterior descending artery middle (approximately16%), and then the proximalright coronary trunk (about11%); coronary artery the hard plaque occurs mostfrequently in the left anterior descending coronary artery proximal segment(approximately24%), followed by the right coronary trunk proximal (approximately13%), then the middle of the left coronary anterior descending artery and thecircumflex artery proximal (about11%).3. The mural coronary occurrence and distribution of coronary arteryatherosclerotic plaque (P <0.05); the left anterior descending coronary arterymyocardial bridge in the middle of the occurrence of the artery proximal atheroscleroticplaque correlation (P <0.05).Conclusion:1．Coronary CT angiography can be relatively accurate for detecting myocardialbridge-wall coronary existence of a clear diagnosis of the diagnosis of coronary arteryatherosclerotic plaque and plaque nature.2.Wall the presence of coronary atherosclerotic plaque occurrence, down themiddle of the branch and its proximal left anterior occurrence of atherosclerotic plaquesis relevant.3.Imaging studies of the clinical diagnosis of myocardial bridge and coronary heartdisease risk assessment is important.