Abstract

The anatomical knowledge including morphometry and topography of coronary ostia is essential for several cardiac procedures including cardiac catheterization and aortic valve replacement. Hence the present study was aimed to study the morphometry and topography of coronary ostia in related to coronary sinus of human cadaveric hearts. Material and methods: A source of 40 human cadaveric hearts from 26 male and 14 female cadavers without gross abnormalities were considered. Parameters including diameter of coronary ostia, diameter of root of right and left coronary arteries, distance from aortic leaflet commissure, position of coronary ostia at sinotubular junction and frequency of coronary ostia were assessed. Results: The mean diameter of right coronary ostia (3.7 mm) was significantly less than left coronary ostia 4.1 mm (p=0.0318). The mean diameter of roots of right and left coronary arteries was 3.12 mm and 3.84 mm respectively. Right coronary ostia were lied below the sinotubular junction in 80% of hearts and left coronary ostia was observed at the level of sinotubular junction in 50% of hearts. Single coronary ostia were commonly observed in anterior (92.5%) and left posterior aortic sinus (97.5%). Conclusion: The anatomical understanding of variations in the morphometry and topography of the coronary ostia accentuate the need of taking them into account in various cardiosurgical operations and interpretation of radiological findings

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