With the increasing trends of coronary heart diseases, the knowledge of variations in the coronary arteries is of paramount importance when considering the various surgical procedures. This study was conducted to know the variations in coronary artery dominance pattern. 77 formalin fixed hearts were dissected. Origin and area of distribution of posterior interventricular artery and SA nodal artery were noted. In 64 hearts (83.11%) posterior inter ventricular artery was a branch of right coronary artery and in 13 hearts (16.88%) it was a branch of left circumflex artery. SA nodal artery was a branch of dominant artery in 46 hearts (59.74%). It arose from non-dominant artery in 29 hearts (37.66%). In the remaining 2 hearts (2.6%) SA nodal artery was a branch from both.