title: Myocardial bridging of the left anterior descending coronary artery: depiction rate and morphologic features by dual-source CT coronary angiography.
abstract: OBJECTIVE
  To evaluate the depiction rate and morphologic features of myocardial bridging (MB) of the left anterior descending coronary artery (LAD) using dual-source CT (DSCT).
  
  
  METHODS
  CT scans from a total of 1,353 patients who underwent DSCT were reviewed retrospectively for LAD-MB. Seventy-eight patients were excluded due to poor image quality or poor enhancement of the coronary artery. The length and depth of the MB were analyzed and classified as superficial or deep with respect to the depth (<or= 1 or > 1 mm) of the LAD tunneled segment. Superficial MB was subdivided into complete or incomplete types according to full or partial encasement of the myocardium.
  
  
  RESULTS
  Of the 1,275 patients included in this study, 557 cases of MB were found from 536 patients (42%). Superficial MB was observed in 368 of 557 (66%) cases, and deep MB was seen in 189 of 557 (34%) cases. Superficial MB showed 2 types: complete (128 of 368, 35%) and incomplete (240 of 368, 65%). The mean length of a tunneled segment for superficial MB was 16.4 +/- 8.6 mm. The mean length and depth of a tunneled segment for deep MB were 27.6 +/- 12.8 mm and 3.0 +/- 1.4 mm, respectively. The incidence of atherosclerotic plaques in a 2-cm-long segment proximal to MB was 16%.
  
  
  CONCLUSIONS
  The depiction rate of LAD-MB using DSCT in a large series of patients was 42%, with two-thirds of MB segments being the superficial type.
authors.affiliation: Department of Radiology, Konkuk University Hospital, Konkuk University School of Medicine, Seoul, Korea.
authors.forename: Jin Ho
authors.initials: JH
authors.lastname: Hwang
authors.forename: Sung Min
authors.initials: SM
authors.lastname: Ko
authors.forename: Hong Gee
authors.initials: HG
authors.lastname: Roh
authors.forename: Meong Gun
authors.initials: MG
authors.lastname: Song
authors.forename: Je Kyoun
authors.initials: JK
authors.lastname: Shin
authors.forename: Hyun Kun
authors.initials: HK
authors.lastname: Chee
authors.forename: Joon Suk
authors.initials: JS
authors.lastname: Kim
mesh_terms: D003287:Contrast Media; D017023:Coronary Angiography / Q000379:methods*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D007472:Iohexol / Q000031:analogs & derivatives; D008297:Male; D008875:Middle Aged; D054084:Myocardial Bridging / Q000000981:diagnostic imaging*; D011857:Radiographic Image Interpretation, Computer-Assisted; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media; D007472:Iohexol; C038192:iopromide
references.citation: AJR Am J Roentgenol. 2006 Jun;186(6 Suppl 2):S391-4
references.pmid: 16714614
references.citation: Semin Ultrasound CT MR. 2008 Jun;29(3):195-203
references.pmid: 18564543
references.citation: Eur J Radiol. 2008 Dec;68(3):434-41
references.pmid: 18993003
references.citation: Circ J. 2010 Jan;74(1):137-41
references.pmid: 19966506
references.citation: Am J Cardiol. 1976 Jun;37(7):993-9
references.pmid: 1274883
references.citation: J Formos Med Assoc. 2009 Jun;108(6):469-74
references.pmid: 19515627
references.citation: Eur J Radiol. 2009 Jan;69(1):156-64
references.pmid: 18023550
references.citation: Br J Radiol. 2007 Sep;80(957):e196-200
references.pmid: 17928487
references.citation: Int J Cardiovasc Imaging. 2010 Feb;26 Suppl 1:93-101
references.pmid: 20033490
references.citation: AJR Am J Roentgenol. 2009 Apr;192(4):1051-6
references.pmid: 19304713
references.citation: Am J Cardiol. 2007 Oct 1;100(7):1081-2
references.pmid: 17884365
references.citation: J Am Coll Cardiol. 2007 Feb 6;49(5):587-93
references.pmid: 17276183
references.citation: J Am Coll Cardiol. 2009 Sep 15;54(12):1072-84
references.pmid: 19744616
references.citation: Int J Cardiol. 2004 Jun;95(2-3):335-7
references.pmid: 15193842
references.citation: Eur Heart J. 2005 Jun;26(12):1159-68
references.pmid: 15764618
references.citation: Eur Heart J. 1980 Aug;1(4):239-45
references.pmid: 7274234
references.citation: Radiology. 2008 May;247(2):346-55
references.pmid: 18372455
references.citation: J Comput Assist Tomogr. 2008 Mar-Apr;32(2):242-6
references.pmid: 18379310
references.citation: Eur J Radiol. 2010 Jan;73(1):89-95
references.pmid: 19038513
references.citation: Am Heart J. 1982 Feb;103(2):283-8
references.pmid: 7055058
references.citation: Acta Radiol. 2009 Sep;50(7):775-80
references.pmid: 19572218
references.citation: Radiology. 2008 Mar;246(3):754-62
references.pmid: 18223120
references.citation: AJR Am J Roentgenol. 2007 Apr;188(4):1074-80
references.pmid: 17377050
references.citation: AJR Am J Roentgenol. 2007 Sep;189(3):567-73
references.pmid: 17715102
references.citation: J Comput Assist Tomogr. 2005 Mar-Apr;29(2):238-40
references.pmid: 15772545
references.citation: Int J Cardiol. 2010 Sep 3;143(3):243-8
references.pmid: 19327854
references.citation: Radiology. 2009 Oct;253(1):56-64
references.pmid: 19587311
references.citation: Circulation. 2009 Mar 17;119(10):1408-16
references.pmid: 19255347
references.citation: Korean J Radiol. 2009 Jul-Aug;10(4):347-54
references.pmid: 19568462
references.citation: Circ J. 2008 Jul;72(7):1079-85
references.pmid: 18577815
references.citation: Circulation. 2002 Nov 12;106(20):2616-22
references.pmid: 12427660
references.citation: J Cardiovasc Comput Tomogr. 2007 Oct;1(2):78-83
references.pmid: 19083883
references.citation: Int J Cardiovasc Imaging. 2008 Apr;24(4):445-52
references.pmid: 17929194
references.citation: Eur J Radiol. 2007 Jan;61(1):130-8
references.pmid: 17045767
references.citation: J Comput Assist Tomogr. 2008 May-Jun;32(3):448-51
references.pmid: 18520555
references.citation: AJR Am J Roentgenol. 2007 Apr;188(4):1069-73
references.pmid: 17377049
references.citation: J Am Coll Cardiol. 2003 Feb 5;41(3):351-9
references.pmid: 12575960
references.citation: Radiol Med. 2009 Oct;114(7):1024-36
references.pmid: 19697102
references.citation: Acta Cardiol. 2009 Jun;64(3):341-6
references.pmid: 19593944