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

Background: Preoperative diagnosis of coronary ostial deformities is also very crucial
in congenital heart diseases such as Fallot’s tetralogy and transposition of arterial
supply. Anatomical understanding of coronary orifices may reduce invasive procedure
morbidity and mortality.The study's objectives were:1) Measure the diameters of the
coronary ostia and coronary artery roots. 2) Measure the distance between the coronary
ostia and the aortic sinus.3)To measure the distance of coronary ostia to the
commissures of aortic leaflets. 4) To examine the relationship between the coronary
ostia and the sinotubular junction.5) Note any accessory or single ostia.
Materials and Methods: The present investigation used 40 human cadaver hearts frozen
with 10% formalin from Govt Medical College, SuryapetTelngana and Viswa Bharathi
Medical College, Kurnool, AP, India.The diameters of the coronary ostia and coronary
artery roots were measured, as well as the distance between the ostia and the aortic
leaflet commissures.
Results: The mean diameter of the left coronary ostium was statistically bigger than the
right coronary ostium. The mean distance of the right coronary ostium from the aortic
sinus was significantly higher than the left.It has deviated to the right commissure
towards right posterior aortic sinus, and the left coronary ostium approximately to the
centre. The diameter of coronary arteries decreased significantly from the ostia to the
roots. From left coronary ostium to artery root, the mean diameter decreased. Most of
the time, the right coronary ostium was below the sinotubular junction, whereas the left
was at the junction. Anterior aortic sinus has many coronary orifices, with one (2.5%)
specimen having triple ostia. Left posterior aortic sinus was the origin of one right
coronary.
Conclusion: The findings of this study contribute to the body of knowledge already
available on the morphology and topography of coronary ostia.This highlights the need
of analyzing the diameter variations of coronary ostia and roots, their relations to
sinotubular junction and aortic commissures, as well as looking for various orifices. As
inability to recognise can cause issues during angiography.