European Journal of Molecular & Clinical Medicine

Introduction: Understanding the anatomy and its variations of coronary arteries forms the base for coronary artery disease diagnosis and planning of surgeries.
Aim: The relation between outer diameter of right conus artery in cadaveric hearts and coronary angiograms, the relation between the diameter of right conus artery with and without the presence of long branches in both cadaveric hearts and coronary angiograms.
Materials and Methods :
150 embalmed cadaveric hearts received from various south Indian states, which were preserved in various colleges of Tamilnadu and Pondicherry was used in this study. 150 coronary angiograms of patients from various south Indian states. Methods adopted was Dissection method and Coronary angiogram were utilized for the study . 
RESULTS: Out of 150 cadaveric heart  and 150 coronary angiogram , the outer diameter of right conus artery arising from right coronary artery in cadaver and in angiograms was compared the resulted p value is less than 0.0001 which is considered to be extremely statistically significant. The number of long branches and short branches are studied with regard to the diameter of right conus artery. Pearson’s correlation coefficient was 0.1716 which is positive.
CONCLUSION: The diameter of right conus artery in the cadaveric study differs with the angiographic study. Thediameter of right conus artery is more when having a long branch

Introduction:The initial portion of the aortic root, which  consists of leaflets of the aortic valve, is occupied by the aortic sinuses, also called the sinuses of Valsalva(1). The aortic sinuses reach beyond the upper border of the cusp and form a well-defined, complete, and circumferential sinutubular ridge when viewed from the aortic aspect. The right coronary artery arises from the right coronary sinus (anterior aortic sinus) of the ascending aorta.. Malformations of the position of the ostia and origin of coronary arteries lead to high risk of sudden death.
Aim: To find the number and level of ostia in right aortic sinus.  
Materials and Methods: 150 cadaveric hearts of both male and female with unknown age fixed in 10% formalin were used to study the the number and level of ostia in right aortic sinus.
Results and Discussion:Out of 150 cadaveric heart studied single ostia is seen in121of heart samples (80.67%). Two ostia seen in 27 of heart samples (18%) and three or more ostia  seen in 2 of heart samples (1.33%). Out of 150 cadaveric hearts studied in 143hearts (95.33%) the ostia is seen below the sinu tubular junction. In 4 hearts (2.67%) the ostia is seen at sinu tubular junctionand in 3 hearts (2%) the ostia is seen above the sinu tubular junction.Murli manju et al (2006) reported that the right coronary ostium below the sinu tubular junction is 16% and above the sinutubular junction in 2% of the cases. Subhash et al (2010) reported the location of right coronary ostium below the sinu tubular junction is 89%. In this study the difference found at all the 3 level with reference to Murli manju et al 2006 could have been due to geographical differences as described by Gouda Hareeshet al (2009)
Conclusion: Thepresence of multiple ostium is suggestive of right conus artery must have been directly arise from the aorta, right coronary artery, SA nodal artery,vasovasorum of pulmonary trunk and anamolous origin of left coronary artery.In most of the heart specimens 95.33% the ostia were seen below the sinu tubular junction.