A morphometric anatomical study on the division of the left main coronary artery and myocardial bridges

Vu Hoang Nguyen, Ernest Talarico

Research output: Contribution to journalArticle

2 Scopus citations


The division of the left main coronary artery (LMCA) exhibits a range of anatomical variation. Itcan divide into two, three, four or five branches, and have myocardial bridges. This carriesim-portant significance in clinical practice. The ob-jective of this study was to examine themor-phometric anatomical variation of the LMCA in Vietnamese cadavers. Hearts from 125cadav-ers preserved in formalin solution were used in the study. LMCA was present in 96% of the spec-imens with the mean diameter of 4.62 ± 0.74 mm and the mean length of 9.05 ± 3.61mm. The LMCA gave rise to two branches (bifurcation) in 51.2%, three branches (trifurcation) in 43.2% and four branches (quadrifurcation) in 5.6%. The mean outer diameter of the anteriorinterventricu-lar artery, circumflex artery and the intermediate branch were 3.78 ± 0.54 mm, 3.33 ± 0.67 mm, and 1.80 ± 0.62 mm, respectively. The anterior inter-ventricular artery ended at theanterior interven-tricular sulcus in 1.6% of the specimens, ended at the apex in 21.6%, and crossed over the apex to reach the posterior interventricular sulcus and ter-minate there in 76.8%. Thecircumflex artery end-ed before the left border in 4.13%, at the left bor-der in 46.28%, between the left border and the crux in 46.62% and at the crux in 4.13%. The myocardial bridge was present only at anterior interventricular artery in 41.6%; in both anterior interventricular arteryand posterior interventricular branch in 5.6%. LMCA varies in length and it can divide into two,three or four branches. End posi-tion of the anterior interventricular artery and the circumflexartery are variable. These variations may prove challenging during percutaneous coro-naryintervention (PCI) or coronary artery diagnos-tic imaging.

Original languageEnglish (US)
Pages (from-to)355-365
Number of pages11
JournalEuropean Journal of Anatomy
Issue number4
StatePublished - Jul 1 2018


  • Anterior interventricular artery
  • Circum-flex artery
  • Crux
  • In-termediate branch
  • Left main coronary artery

ASJC Scopus subject areas

  • Anatomy

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