A Detailed Study on Measurements and Location of Coronary Ostia | Chapter 20 | Highlights on Medicine and Medical Science Vol. 15

 Aims: Traditional anatomical dissection of 100 human heart specimens was used to investigate the morphometric and topological properties of the coronary ostia.

For the gross dissection, the criteria from Cunningham's Manual were used. The pericardium around the aorta's root was removed, and the sources of the right and left coronary arteries were traced. The number of coronary ostia and their location in relation to the intercommissural line (ICL), coronary ostia diameter, coronary ostia distance from the aortic sinus's bottom, on the right and left sides of the ostia, and the distance between the coronary ostia and the commissures of the aortic leaflets were all factors considered by the researchers.

The number of coronary ostia in 71 percent of the specimens was normal, with one in the anterior aortic sinus (AAS) and one in the left posterior sinus (LPS) (LPS). In 19% of cases, the third coronary artery (TCA) was discovered. In the AAS, there was only one ostium, while the ostium for the left coronary artery (LCA) was missing in the LPS. In one example, there were two ostia in the LPS, one for the left anterior descending (LAD) and the other for the left circumflex (LCx). The right coronary ostium (RCO) was discovered below the ICL. In 62 percent of cases, the left coronary ostium (LCO) was below the ICL, and in 44 percent of cases, the LCO was below the ICL. RCO had a mean diameter of 2.77mm while LCO had a diameter of 4.11mm. The RCO's average distance from the aortic sinus's bottom was 14.46 mm, while LCO's was 14.3 mm. The RCO was moved from its normal position towards the commissure between the anterior aortic sinus (AAS) and the right posterior sinus (RPS) more frequently than usual (RPS). The LCO were implanted in the left posterior sinus in a more or less central position (LPS).

Conclusion: Understanding the various origins of coronary arteries in the human heart, as well as the capacity to recognise and identify them, may help overcome potential barriers during cardiothoracic surgical procedures.

Author (s) Details

Parimala Sirikonda
Department of Anatomy, Bhaskar Medical College, Yenkapally, Moinabad-500075, Rangareddy District, Andhrapradesh, India.

S. Sreelatha
Department of Anatomy, Bhaskar Medical College, Yenkapally, Moinabad-500075, Rangareddy District, Andhrapradesh, India.

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