Abstract

Introduction: Sinoatrial Nodal artery is an artery which supplies the sinoatrial node, the natural pacemaker center of the heart, usually a branch of right coronary artery but also from left coronary artery in variable percentage in different population. Aim: The aim of the study was to study the anatomical origin of sinoatrial Nodal artery , from Right coronary artery or left coronary artery in indian human cadavers Materials and Methods: The study was carried out on 50 formalin fixed Adult Human Cadaveric Heart of Indian population obtained from department of Anatomy subharti medical college Meerut UP INDIA. Specimens with gross congenital anomalies were excluded from the study. The coronary arteries were dissected for the origin of sinoatrial Nodal artery. Results: Out of total 50 cases studied, sinoatrial nodal artery was originating from right coronary artery in 39 (78%) hearts while in remaining 11 (21.27%) hearts SA nodal artery was arising from left coronary artery. When it is arising from left coronary artery it is a branch of left circumflex artery rather than the main trunk. Conclusions: In present study of Indian Human cadaveric hearts SA Nodal artery is originating from right coronary artery in maximum (78.0) percent population comparing with the previous studies done globaly. Further studies are needed in Indian population in relation to SA Nodal Artery. Study of origin and distribution of sinoatrial nodal artery helps cardiologist and cardiac surgeons to understand the ischemic etiology of sinus node diseases and corrective steps needed.

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