Background: Coronary diseases are more encountered in the clinic and clinical practices are being done regularly nowadays. Knowledge regarding the variations in coronary distribution has become a necessity especially for its implication in clinical and surgical procedures. Incidence of variations are most usually seen with the origin, length, branches, and area supplying. Some variations are of considerable clinical importance because misinterpretation of these variations may be disastrous.
Material and Methods: Thirty human hearts were taken for the study. They were dissected and analyzed.
Results: In 70% of the specimens, right coronary artery reached the crux of the heart, in 16.67% it crossed the crux, and in 13.33% it didn’t reach the crux. No anomalies in the origin and course of left coronary artery was found. The average mean length of left coronary artery was 12.42 mm. In 46.67% the diagonal artery aroused from the circumflex artery and in 43.33% from left anterior descending artery. In 10%, left coronary artery trifurcated into left anterior descending, diagonal and circumflex branches. In 13.33% circumflex branch coursed to reach the crux of the heart, in 70% it reached between obtuse margin and crux, and in 16.67% it was short terminating at the obtuse margin. In 3.33% of the specimen, two parallel branches of right coronary artery were found to traverse in the posterior interventricular groove. In 40% the posterior interventricular artery didn’t reach halfway the length of the posterior interventricular groove, in 33.33% it reached the halfway and in 26.67% it traversed about 3/4th length of the groove. Right coronary dominance was present in 86.67% of the specimens and 13.33% were left dominance. Co-dominance wasn’t found.