The Risk Factors Of Atherosclerosis Stenosis In Proximal Of The Anterior Descending Coronary Artery Myocardial Bridge

Objective To analyze the anatomic characteristic about myocardial bridge and muralcoronary artery by dual-source ct coronary angiography. Methods The present studyincluded857patients who accepted Dual-source CT when performed in our hospitalfrom July2010to September2011, and there were387patients with myocardialbridge, located in Left Anterior Descending Coronary Artery(LAD), LeftCircumflex Artery (LCA), Right Coronary Artery (RCA) and so on. We dividedstenosis into proximal, distal and mural coronary artery through the different positionbetween myocardial bridge and stenosis. Results myocardial bridge of383patientslocated in LAD,1patients in LCA and3patient in RCA. In the patients withmyocardial bridge in LAD, There were221patiens with stenosis in proximal, only6patients with stenosis in proximal and distal,2patients in mural coronary artery,4patients with two stenosis in proximal, further more, the length of myocardial bridgeis5.40~80.7mm,average length is20.2mm,and the degree of compression ofmyocardial bridge is5%~80%,average degree is44.0%.The differences betweenstenosis in proximal and in distal, mural coronary artery have a statisticalsignificantly (P<0.05). Conclusions Dual-source CT coronary angiography cannoninvasive analyze the anatomic characteristic about myocardial bridge and muralcoronary artery. There are more patients with myocardial bridge locate inLAD and more atherosclerotic lesion in MB patients was in the proximal segment tothe bridge． Objective To evaluate the susceptible factors of atherosclerosis stenosis inProximal of the anterior descending coronary artery myocardial bridge. Methods The presentStudy included383patients with anterior descending coronary artery myocardial found onDual-source CT performed in our hospital from July2010to September2011.The patients wereSubdivided into two group based on weather suffered from atherosclerosis stenosis in proximalof myocardial bridge or not, there are221patients with stenosis in group A, and162patientsnot with stenosis in group B. collected the factors of two groups include age, gender,hypertension, diabetes, hyperlipidemia, smoking, length and degree of compression ofmyocardial bridge et. Results The differences between two groups in hypertension,diabetes, hyperlipidemia, smoking, length of MB is no statistical significantly(P>0.05), whereas there were more male patients (62.0%vs48.1%P<0.01), elder(66±9.9vs61±10.2P<0.01), more degree of compression of myocardial bridge (51.3±15.8%vs34.0±18.7%,P<0.01)in group with stenosis. A further multivariate logistic regressions analysissuggested that age (OR=1.109,P<0.05) and degree of compressions (OR=1.084,P<0.05) had acorrelation with proximal of the anterior descending coronary artery myocardial bridge, butgender had not(P>0.05).Conclusions Age and degree of compression of myocardial bridge issusceptible factors of atherosclerosis stenosis in proximal of the anterior descending coronaryartery MB.