The anatomic variations of the arterial supply of the human heart : right or left coronary artery dominance : an angiographic study

الملخص EN

It is well known that, the coronary arteries vary in their number, origin and course.

This work aims to study the dominance of the coronary arteries on the livings showing the aspects of source and trajectory of these vessels.

Vie dominance of the coronary arteries was done according to the statement that, in the case of "right dominance " the posterior interventricular artery is a large branch of the right coronary artery, Whereas in the case of "left dominance " the posterior interventricular artery is a branch of the left coronary artery.

So the artery giving off the posterior interventricular branch is defined as the dominant artery.

Hits study was based on the angiographic results of cases attended to the Cardiac Catheterization Unit, Cardiology Department, Assiut University Hospitals.

The total number of cases was 149 cases (12(1 males and 29 females) of different ages ranging from 20-72years.

The results of this study were analyzed statistically and it was found that the dominance of the coronary arteries is mainly right, in either males or females.

The Majority of cases were found to lie in the age group 40^y0years.

Also, significant statistical differences were found in the age groups 20-40 and 40-60years.

Whereas, there were no significant statistical of differences the age group above sixty years This knowledge wilt be of importance clinical anatomic teaching.

Also it will be helpful in the interpretation of coronary angiography and surgical myocardial revascularization.