Anatomical Study Of Origin Of Sinoatrial Nodal Artery In Human Cadaveric Hearts

ABSTRACT

Introduction: Sinoatrial Nodal artery is an artery which supplies the sinoatrial node, the natural pacemakercenter of the heart, usually a branch of right coronary artery but also from left coronary artery in variablepercentage in different population.Aim: The aim of the study was to study the anatomical origin of sinoatrial Nodal artery , from Right coronaryartery or left coronary artery in indian human cadaversMaterials and Methods: The study was carried out on 50 formalin fixed Adult Human Cadaveric Heart of Indianpopulation obtained from department of Anatomy subharti medical college Meerut UP INDIA. Specimens withgross congenital anomalies were excluded from the study. The coronary arteries were dissected for the origin ofsinoatrial 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. Whenit 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 coronaryartery in maximum (78.0) percent population comparing with the previous studies done globaly. Further studiesare needed in Indian population in relation to SA Nodal Artery. Study of origin and distribution of sinoatrialnodal artery helps cardiologist and cardiac surgeons to understand the ischemic etiology of sinus node diseasesand corrective steps needed.