Depiction of Normal and Variant Anatomy of Coronary Artery 64 Slice Multi Detector Computed Tomography (MDCT) Coronary Angiography among North Indian Population

The aim of the study was to access and review the appearance of normal pattern of left and right coronary artery and their anatomic variants and to assess the incidence of anatomic variants in subject of North Indian population who underwent 64 slice Computed Tomographic coronary Angiography (CT-CA) for suspected or known of coronary artery disease (CAD) This study was carried out in the Departments of Radiodiagnosis, KGMU, U.P, Lucknow, India. Total One hundred and fifty CT Coronary Angiograms of routine subjects of either sex and of different age groups coming to the department of Radiodiagnosis were evaluated prospectively to see the normal and variant anatomy of right and Left Coronary Arteries regarding their origin, length of main trunk and branching pattern and the result in term of incidence was evaluated. Most common origin of Right coronary artery (RCA) and left coronary artery (LCA) was from left posterior erotic sinus and RCA from interior erotic sinus the main branch of RCA aim of this study was to review the appearance of normal patterns of right and left coronary arteries their anatomic variants and anomalies and to assess their incidence in subjects of North India who underwent 64-slice Computed Tomographic Coronary Angiography (CT-CA) for suspected or known coronary artery disease (CAD). Most common origin of Right coronary artery (RCA) was anterior aortic sinus and left coronary artery (LCA) from Left Posterior Aortic Sinus (LPAS). The main branches of Right coronary artery (RCA) are sinoatrial nodal artery (78%), conus artery (86%), acute marginal branches, posterior descending artery (86%). The two main branches of the left coronary artery (LCA) are Left Circumflex (LCX) artery and Left Anterior Descending (LAD) artery. This study revealed that the main trunk of LCA bifurcated into LCX artery and LAD artery in 68% subjects. The most common position of orifices of Right coronary artery (RCA) and left coronary artery (LCA) was below the Sino tubular junction (82%). The artery was seen to be trifurcating in 30% cases with the Ramus Intermedius (RI) being the third artery and tetrafurcated in 2% subjects.