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. 2021 Jun;18(2):87-91.
doi: 10.5114/kitp.2021.107469. Epub 2021 Jul 5.

Evaluation of the morphological and clinical features of left anterior descending myocardial bridging with multi-detector computed tomography

Neşat Çullu  1 , İbrahim Önder Yeniçeri  1 , Murat Yunus Özdemir  1 , İlknur Altun  2 , Emrah Doğan  1
Affiliations

Evaluation of the morphological and clinical features of left anterior descending myocardial bridging with multi-detector computed tomography

Neşat Çullu et al. Kardiochir Torakochirurgia Pol. 2021 Jun.

Abstract

Aim: The aim of the study was to assess the incidence, localization, depth, length of myocardial bridging (MB) with left anterior descending (LAD), systolic compression ratio, atherosclerotic plaque localization and degree of stenosis by 256-slice multi-detector computed tomography (MDCT).

Material and methods: Computed tomography (CT) scans from a total of 3947 patients who underwent MDCT were reviewed retrospectively for LAD MB. A diastolic and systolic dataset with the best image quality was selected. Myocardial bridge was defined as a coronary artery with an intra-myocardial course. Myocardial bridging was divided into "deep" or "superficial". The length and depth of the bridging segment were calculated. For each bridging segment, the presence of atherosclerosis was saved in a 2-cm-long segment proximal to the entry of the bridging segment. The degree of stenosis made by atherosclerotic plaques was determined.

Results: LAD myocardial bridging was detected in 410 (10.4%) patients. Among these, 97 (23.7%) patients had a deep and 313 (76.3%) patients had a superficial course. The mean LAD MB length was 20.28 ±9.63 mm and the depth was 1.72 ±1.11 mm. The systolic and diastolic mean diameter difference was 0.193 mm and the average compression ratio was 9.44%. Atherosclerotic plaques were found in 167 (40.7%) of 410 LAD MB. Atherosclerotic plaques were found in 50.5% of deep MB and 37.7% of superficial MB.

Conclusions: 256-slice MDCT coronary angiography has a high sensitivity to show myocardial bridging in LAD localization, to determine length, depth, compression ratio, atherosclerotic plaque localization and degree of stenosis.

Keywords: coronary artery; left anterior descending myocardial bridging; multi-detector computed tomography.

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Conflict of interest statement

The authors report no conflict of interest.

Figures

Figure 1
Figure 1
Flow chart of patient inclusion and exclusion CCTA – coronary computed tomography angiography, CA – catheter angiography, MB – myocardial bridging.
Figure 2
Figure 2
LAD middle segment long segment deep myocardial bridging
Figure 3
Figure 3
LAD mid segment short segment deep myocardial bridging
See this image and copyright information in PMC

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