Coronary artery morphometrics in Indians – An optical coherence tomography perspective

Abstract

Abstract BACKGROUND: The diameter of the coronary artery is an important predictor of prognosis and long-term outcome after percutaneous coronary interventions. There are very limited data available about coronary artery dimensions in an Indian population. AIMS: The aim is to study the normal dimensions of the coronary artery segments in Indians without coronary artery disease using optical coherence tomography and to compare the dimensions in Indians with Western. METHODS: Two hundred patients who have undergone coronary angiography with an entirely normal coronary angiogram were included in our study. RESULTS: This study showed the diameter of vessels in males and females when taken together, the left main was larger in size, followed by the proximal left anterior descending, proximal right coronary artery, and proximal left circumflex, respectively. When the vessel diameter was indexed to body surface area (BSA), there was no statistical difference between males and females (P > 0.05). The computed value of proximal coronary artery diameter unadjusted for individual BSA, when compared to Caucasians, showed that Caucasians have larger coronary artery dimensions than Indians. However, when the proximal vessel diameter was indexed to BSA, there was no statistically significant difference between Indians and Caucasians (P > 0.05). CONCLUSIONS: We found that coronary artery size when indexed to BSA is not statistically different in Indian males and females and compared to Caucasians. However, with a smaller body habitus, Indians have smaller coronary arteries.