title: [Morphological and quantitative evaluation of myocardial bridge and mural coronary artery with 256-slice CT angiography: initial clinical experience].
abstract: OBJECTIVE
  To determine the morphological characteristics of myocardial bridge and mural coronary artery (MB-MCA) and initially quantify the changes of MB-MCA in diastole and systole phase with multiple-phase reconstruction technique using 256-slice CT angiography (256-slice CTA).
  
  
  METHODS
  We retrospectively collected the coronary artery imaging data of 861 patients undergoing 256-slice CTA with suspected or documented coronary artery disease. The images were reviewed by two independent radiologists, the diagnosis of MB-MCA was confirmed when consistency was obtained. The length, diameter and thickness of MB-MCA in the middle segment of LAD (LAD2) in diastole and systole phase were recorded, and changes of MB-MCA were calculated.
  
  
  RESULTS
  Among the 861 patients, 150 MB-MCA were found in 131 patients (15.2%). 99 MB-MCA (66.0%) were located in LAD2, the remaining 51 (34.0%) in the other segments of coronary arteries. The average length and thickness of MB was (17.6 ± 5.7) mm and (2.6 ± 0.7) mm, respectively. The average diameter change of MCA in LAD2 from systole phase to diastole phase was (1.2 ± 0.5) mm, and 41% of MCA have diameter stenosis more than 50% in systole phase.
  
  
  CONCLUSIONS
  The changes of MB-MCA from diastole to systole phase could be determined to some extent by 256-slice CTA multiple-phase reconstruction technique.
authors.affiliation: Department of Radiology, China-Japan Friendship Hospital, Beijing 100029, China.
authors.forename: En-sen
authors.initials: ES
authors.lastname: Ma
authors.forename: Wu
authors.initials: W
authors.lastname: Wang
authors.forename: Guo-lin
authors.initials: GL
authors.lastname: Ma
authors.forename: Tao
authors.initials: T
authors.lastname: Zheng
authors.forename: Hong-wei
authors.initials: HW
authors.lastname: Yu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017023:Coronary Angiography / Q000379:methods*; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D054084:Myocardial Bridging / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*