title: Assessment of myocardial bridge and mural coronary artery using ECG-gated 256-slice CT angiography: a retrospective study.
abstract: Recent clinical reports have indicated that myocardial bridge and mural coronary artery complex (MB-MCA) might cause major adverse cardiac events. 256-slice CT angiography (256-slice CTA) is a newly developed CT system with faster scanning and lower radiation dose compared with other CT systems. The objective of this study is to evaluate the morphological features of MB-MCA and determine its changes from diastole to systole phase using 256-slice CTA. The imaging data of 2462 patients were collected retrospectively. Two independent radiologists reviewed the collected images and the diagnosis of MB-MCA was confirmed when consistency was obtained. The length, diameter, and thickness of MB-MCA in diastole and systole phases were recorded, and changes of MB-MCA were calculated. Our results showed that among the 2462 patients examined, 336 have one or multiple MB-MCA (13.6%). Out of 389 MB-MCA segments, 235 sites were located in LAD2 (60.41%). The average diameter change of MCA in LAD2 from systole phase to diastole phase was 1.1 ± 0.4 mm, and 34.9% of MCA have more than 50% diameter stenosis in systole phase. This study suggested that 256-slice CTA multiple-phase reconstruction technique is a reliable method to determine the changes of MB-MCA from diastole to systole phase.
authors.affiliation: Department of Radiology, China-Japan Friendship Hospital, East Yinghua Road, He Pingli, Chao Yang District, Beijing 100029, China.
authors.forename: En-sen
authors.initials: ES
authors.lastname: Ma
authors.forename: Guo-lin
authors.initials: GL
authors.lastname: Ma
authors.forename: Hong-wei
authors.initials: HW
authors.lastname: Yu
authors.forename: Wang
authors.initials: W
authors.lastname: Wu
authors.forename: Kefeng
authors.initials: K
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D055424:Cardiac-Gated Imaging Techniques / Q000706:statistics & numerical data*; D002681:China / Q000453:epidemiology; D017023:Coronary Angiography / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D054084:Myocardial Bridging / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D015995:Prevalence; D015203:Reproducibility of Results; D018570:Risk Assessment; D012307:Risk Factors; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*; D055815:Young Adult