International Journal of Anatomy and Research

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Type of Article: Original Research

Year: 2016 | Volume 4 | Issue 3 | Page No. 2817-2821

Date of Publication: 30-09-2016



Priyadharshini. S *1, Sivakumar. M 2.

*1 Assistant Professor, Department of Anatomy, Al- Azhar Medical College and Super speciality hospital, Ezhalloor, Thodupuzha, Idukki District, Kerala, India.

2 Additional Professor, Department of Anatomy, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India.

Address: Dr. Priyadharshini. S, Assistant Professor, Department of Anatomy, Al- Azhar Medical College and Super speciality hospital, Ezhalloor, Thodupuzha, Idukki District, Kerala 685605, India.


Background: The pattern of coronary arterial dominance varies in different populations. The knowledge of dominant pattern of coronary arteries has clinical significance. It is important in the interpretation of findings of cardiovascular diseases and in planning the treatment. Though right dominance is more prevalent, coronary artery disease is more common with those having left dominance circulation. Since adequate literature regarding coronary arterial dominance pattern and its variations in people living in and around Puducherry is not available, a study of coronary arteries in adult cadaveric hearts was undertaken.
Aim and Objectives: To study the dominance pattern, variations, the external diameter and the level of termination of coronary arteries and their main branches.    
Materials and Methods:  50 human cadaveric hearts were studied by dissection. The origin of posterior interventricular artery was taken as the basis of dominance. The level of termination of the right coronary artery and the anterior interventricular artery was studied. The external diameter of the coronary arteries was measured using digital caliper. Variations in the coronary arteries and their branches were noted. 
Results: In this study the right, left and co dominance were found to be 84%, 8%, and 8% respectively. These results were compared with previous studies and discussed. Myocardial bridge was noted over the anterior interventricular artery in one heart. In one specimen a branch from both right coronary artery and circumflex artery unite to form the posterior interventricular artery.   
Conclusion: The majority of hearts are right dominant. The left dominance and co dominance are less common.
KEY WORDS: Coronary artery, Coronary dominance, Anterior interventricular artery, Posterior interventricular artery, Myocardial bridge.


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Priyadharshini. S, Sivakumar. M. A STUDY OF CORONARY ARTERIAL DOMINANCE PATTERN. Int J Anat Res 2016;4(3):2817-2821. DOI: 10.16965/ijar.2016.343




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