The morphologic and functional features of LAD myocardial bridging at multi-detector computed tomography coronary

Alper Aydın1, Rahmi Çubuk2, Mehmet Mahir Atasoy2

  • 1Department of Cardiology, Bahçeşehir University Faculty of Medicine, İstanbul, Turkey. dralperaydin@gmail.com.

Insights

Myocardial bridging (MB) depth, evaluated by MDCT coronary angiography, correlates with systolic compression. However, MB morphologic features do not predict coronary artery disease (CAD) presence.

Area of Science:

  • Cardiovascular Imaging
  • Cardiac Anatomy
  • Interventional Cardiology

Background:

  • Myocardial bridging (MB) is a congenital anomaly where a segment of a coronary artery tunneled within the myocardium.
  • The clinical significance of MB and its association with atherosclerosis remain areas of active investigation.

Purpose of the Study:

  • To retrospectively assess morphologic and functional characteristics of MB using multi-detector computed tomography (MDCT) coronary angiography.
  • To investigate the relationship between MB morphologic features and the presence of atherosclerosis in the coronary arteries.

Main Methods:

  • Retrospective analysis of 191 consecutive patients undergoing MDCT coronary angiography.
  • Detailed evaluation of MB morphologic features, including depth, length, and distance from the left coronary ostium.
  • Correlation analysis between MB characteristics, systolic compression, and coronary artery disease (CAD) presence.

Main Results:

  • MB was detected in 41 patients (21.5%), predominantly in the left anterior descending artery.
  • A significant correlation was observed between the percentage of systolic compression and the depth of the tunneled MB segment (r=0.538, p<0.01).
  • No significant relationship was found between MB morphologic features (depth, length, distance from ostium) and the presence of proximal CAD.

Conclusions:

  • MDCT coronary angiography effectively visualizes MB morphologic and functional attributes.
  • MB depth is a key determinant of systolic compression, while other morphologic features do not appear to influence compression or predict CAD.
  • Further research is warranted to elucidate the precise role of MB in the pathogenesis of coronary atherosclerosis.
Abstract

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