Variation In Number & Diameter of Coronary Artery Ostia: A Combined Gross Anatomical & Angiographic Study
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2017, Vol 16, Issue 5
Abstract
Introduction: The right and left coronary arteries arise from the ascending aorta in its anterior and left posterior sinuses. The calibre of coronary arteries, both main stems and larger branches, based on measurements of arterial casts or angiograms, ranges between 1.5 and 5.5 mm for the coronary arteries at their origins. The left exceed the right in 60% of hearts, the right being larger in 17%, and both vessels being approximately equal in 23%. Material and Methods: 55 heart specimens were dissected and 82 cases of angiography were studied. The aorta was cut opened transversely, approximately 0.5 cm above the openings of RCA & LMCA. Numbers of ostial openings were counted and Location of respective ostia in the aortic sinus was noted. After cutting coronary arteries just outside the wall of aorta inner diameter of each was taken with the help of Vernier caliper. In Angiography measurement of diameter of ostium was calibrated with the diameter of the catheter (2 mm) used. Result: In 95.62% cases there were two ostia in aortic sinuses for RCA and LMCA each. In 3 cases the ostia of RCA were located in left posterior aortic sinus, In remaining 134 cases ostia of RCA were located in anterior aortic sinus. In all cases ostia of LMCA was located in left posterior aortic sinus. In 4.38% cases third ostium was present in anterior aortic sinus for 3rd coronary artery (right conus artery). Ostial diameter of RCA was 3.55 ± 0.92 mm, LMCA was 4.94 ± 0.95 mm and of 3rd coronary artery was 1.2 ± 0.4 mm. Conclusions: The origin of RCA & LMCA is in anterior aortic sinus & left posterior aortic sinus respectively with few exceptions in RCA. The diameter of LMCA was more than RCA. The difference in ostial diameter in male and females is statistically not significant.
Authors and Affiliations
Dr. Gourav Dadarao Thakre, Dr. Vaishali v. Inamdar, Dr. Deepak s. Joshi
Keywords
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- EP ID EP598145
- DOI 10.9790/0853-1605110811.
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