title: [CT imaging characteristics of incomplete and complete myocardial bridges-mural coronary artery].
abstract: OBJECTIVE
  To evaluate the CT imaging characteristics of incomplete and complete myocardial bridges-mural coronary artery (MB-MCA).
  
  
  METHODS
  Fifty subjects with dual source coronary CT angiography (DSCTA) evidenced MB were included. The subjects were divided into incomplete MB-MCA and complete MB-MCA groups. The diameter of MCA in best systole phase and diastole phase, the MCA stenosis rate, the presence of atheromatous change proximal to the MB were evaluated.
  
  
  RESULTS
  There were 58 MB, the average length was (2.02 ± 1.02) cm, 23 were incomplete MB and 35 were complete MB. Thirty-two MB were in the middle segments of left anterior descending artery (55.2%); 17 MB were in the distal segment of the left anterior descending artery (29.3%); 1 MB was in the proximal segment of left anterior descending artery; 3 MB in diagonal branch; 4 MB in obtuse marginal branch, 1 MB in distal right coronary artery. It was statistically significant difference between the incomplete MB-MCA and the complete MB-MCA of the diameter change in diastole and systole phase [(1.93 ± 0.49) mm, (1.71 ± 0.45) mm vs. (2.21 ± 0.41) mm, (1.63 ± 0.52) mm, P = 0.008] and stenosis rate (10.38% ± 20.2% vs. 25.12% ± 21.02%, P = 0.01). Atherosclerotic finding was evidenced in 8 incomplete MB (34.78%) and 15 complete MB (42.86%) at the proximal vessel of mural coronary artery (P > 0.05).
  
  
  CONCLUSIONS
  DSCTA can vividly display the incomplete and complete myocardial MB, accurately evaluate the shape change of MB-MCA in diastole and systole phase and detect the atherosclerotic change in the proximal vessel of MB.
authors.affiliation: Department of Radiology, Huazhong Science and Technology University, Wuhan 430022, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Gu
authors.forename: He-shui
authors.initials: HS
authors.lastname: Shi
authors.forename: Ping
authors.initials: P
authors.lastname: Han
authors.forename: Yun-feng
authors.initials: YF
authors.lastname: Zhou
authors.forename: Ai-lan
authors.initials: AL
authors.lastname: Wu
authors.forename: Hong-wei
authors.initials: HW
authors.lastname: Ren
authors.forename: Yong-hua
authors.initials: YH
authors.lastname: Liu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D050197:Atherosclerosis / Q000000981:diagnostic imaging*; D017023:Coronary Angiography; D003331:Coronary Vessels; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D054084:Myocardial Bridging / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed