The present study was designed to assess the incidence of different anatomical variations of the left coronary artery (LCA) and their branches. Also, it was designed to study the dominance pattern of coronary arteries. It was carried out on 30 human adult cadaveric hearts, 200 three-dimensional coronary computed tomographic angiography (3D-CCTA) scans, and 200 coronary catheterization angiography obtained from the Anatomy, Radiology, and Cardiology Department, Beni-Suef, Cairo as well as El Minia University. The current work revealed that there was not any case of higher take-off origin of the left coronary artery. The incidence of the LCA branching mode was 74.1%, 24.18%, and 0.46% for the bifurcation, trifurcation, and tetrafurcation, respectively. A statistically significant correlation between the diagonal branches of the left anterior descending artery and the mode of branching of the LCA had been demonstrated. The incidence of coronary artery dominance was 77%, 14%, and 9% for right, left, and co-dominant pattern. It can be concluded that perfect knowledge of the anatomical variations of the mode of branching of the LCA is essential for cardiologists and radiologists, during diagnostic and therapeutic cardiac procedures.
Hanan D. Yassa1, Gaber H. Abdelfatah1, Nourhan T. Sabra1, Abd Elwakeel E. Essawy2
1 Department of Anatomy and Embryology, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
2 Department of Anatomy and Embryology, Faculty of Medicine, Cairo University, Cairo, Egypt