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Myocardial bridging as evaluated by 16 row MDCT.

Abstract：

PURPOSE:The purpose of this study is to find out the prevalence, appearance and clinical symptoms of myocardial bridging (MB) by MDCT coronary angiography (CTA). MATERIALS AND METHODS:A total of 280 (50 females) consecutive patients followed with coronary artery disease or postoperative stent and bypass control, underwent CTA performed by 16-MDCT scanner between January 2006 and April 2006. Short axis multiplanar reformatted images were evaluated. MBs were classified as complete and incomplete bridges with respect to continuity of the myocardium over the tunneled segment of left anterior descending artery (LAD) in interventricular groove and the cut-off value is 1.3mm. Patients diagnosed with MB on CTA who had prior catheter angiography studies were re-evaluated for the presence of MB. RESULTS:One hundred and twenty MBs [98 (81.6%) on LAD, 2 (1.6%) on diagonal branch, 11 (9.1%) on obtuse marginal, 4 (3.3%) on right coronary artery, 5 (4.1%) on ramus intermedius artery] were detected in 108 (38.5%) patients. Eighty-five (70.8%) of bridged segments in 79 (28.2%) patients were complete and the rest [35 (29.2%) in 34 (12.1%) patients] were incomplete. In 12 patients two MBs (either on different arteries or on the same artery) were detected. The length of bridged segments in patients with complete and incomplete MBs varied between 4-50.9mm (mean 18mm) and 4-37.3mm (mean 13.6mm), respectively, and the depth of myocardium over the artery ranged between 1-6.4mm (mean 2.3mm) and 1-1.2mm (mean 1mm), respectively. Thirty (27.7%) out of 108 patients, in whom MB was detected on CTA, were found to have correlative catheter angiography studies, retrospectively and MB was detected only in 4 (13.3%) out of 30 patients. CONCLUSION:MDCT coronary angiography is a non-invasive, efficient method in the diagnosis of MB avoiding the procedural risks that catheter angiography carries. MDCT coronary angiography allows direct visualization of the bridge itself and may thus give the opportunity to differentiate between complete and incomplete myocardial bridges.

journal_name

Eur J Radiol

journal_title

European journal of radiology

authors

Canyigit M,Hazirolan T,Karcaaltincaba M,Dagoglu MG,Akata D,Aytemir K,Oto A,Balkanci F,Akpinar E,Besim A

doi

10.1016/j.ejrad.2007.09.038

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

156-64

issue

1

eissn

0720-048X

issn

1872-7727

pii

S0720-048X(07)00495-0

journal_volume

69

pub_type

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