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Myocardial bridges.

K V Venkateshu1, V R Mysorekar, M B Sanikop

  • 1Department of Anatomy, Sri Devaraj Urs Medical College, Kolar.

Journal of the Indian Medical Association
|March 27, 2001
PubMed
Summary
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Muscular bridges in coronary arteries are linked to sudden cardiac death during exercise. This study found muscular bridges in 14.2% of 106 hearts examined, primarily affecting the left anterior descending artery.

Area of Science:

  • Cardiovascular Anatomy
  • Pathology
  • Sports Cardiology

Background:

  • Sudden cardiac death during strenuous exercise is a growing concern.
  • Muscular bridges of the coronary arteries are increasingly implicated in these events.
  • Previous reports show a wide incidence range (5.4-85.7%) for muscular bridges.

Purpose of the Study:

  • To determine the incidence and characteristics of coronary artery muscular bridges.
  • To investigate the anatomical distribution of these bridges.

Main Methods:

  • A total of 106 human hearts were examined (30 postmortem, 76 from embalmed cadavers).
  • Hearts were dissected to identify and measure any muscular bridges present.
  • Specific coronary arteries were analyzed for the presence of bridges.

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Main Results:

  • Muscular bridges were identified in 15 out of 106 hearts (14.2% incidence).
  • Bridge lengths ranged from 4mm to 40mm, with most measuring 10-19mm.
  • Bridges were exclusively found on the left anterior descending and left diagonal arteries.

Conclusions:

  • Coronary artery muscular bridges occur in a significant percentage of the population.
  • The left anterior descending and left diagonal arteries are the primary sites for these bridges.
  • Further research is needed to fully understand the clinical significance and link to sudden cardiac death.