title: Anatomical characteristics of myocardial bridge in patients with myocardial infarction by multi-detector computed tomography.
abstract: BACKGROUND
  Recent development of multi-detector computed tomography (MDCT) has made the detection of myocardial bridge (MB) easier on the left anterior descending coronary artery (LAD). The LAD segment proximal to the MB is well known to be susceptible to atherosclerosis. Anatomical characteristics of MB on LAD in patients with myocardial infarction (MI) were examined by MDCT.
  
  
  RESULTS
  Subjects were 43 MI patients who had MB in the LAD and comprised 2 groups: 14 with culprit lesions in the LAD proximal to MB (culprit group) and 29 without culprit lesions in the LAD (non-culprit group). MB length, MB thickness, and the distance from the orifice of left main trunk (LMT) to MB entrance were compared. Age and coronary risk factors showed no significant difference between the 2 groups. MB length (P=0.011), MB thickness (P=0.035), and index of the length multiplied by thickness of MB (P=0.031) were significantly greater in the culprit group. The distance from the orifice of the LMT to MB entrance was significantly shorter in the culprit group (P=0.006).
  
  
  CONCLUSIONS
  Anatomical properties of MB, such as length and thickness of MB as well as MB location, are associated with the formation of culprit lesions of LAD proximal to MB in MI.
authors.affiliation: Department of Cardiovascular Medicine, Toho University Omori Medical Center, 6-11-1 Omori-nishi, Ohta-ku, Tokyo 143-8541, Japan.
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Takamura
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Fujimoto
authors.forename: Shuji
authors.initials: S
authors.lastname: Nanjo
authors.forename: Rine
authors.initials: R
authors.lastname: Nakanishi
authors.forename: Shinji
authors.initials: S
authors.lastname: Hisatake
authors.forename: Atsushi
authors.initials: A
authors.lastname: Namiki
authors.forename: Yukio
authors.initials: Y
authors.lastname: Ishikawa
authors.forename: Toshiharu
authors.initials: T
authors.lastname: Ishii
authors.forename: Junichi
authors.initials: J
authors.lastname: Yamazaki
mesh_terms: D000368:Aged; D017023:Coronary Angiography; D003331:Coronary Vessels / Q000473:pathology; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D054084:Myocardial Bridging / Q000000981:diagnostic imaging* / Q000473:pathology*; D009203:Myocardial Infarction / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000473:pathology*; D009206:Myocardium / Q000473:pathology; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods*