Variant coronary artery among cadaveric hearts in Ethiopia
Coronary artery variation/anomaly is defined as a coronary artery with abnormal origin, course, termination or anomalies of intrinsic coronary arterial anatomy. Thorough, sound and complete knowledge of the magnitude of a variant coronary artery is important for correct interpretation of angiography findings mainly during cardiac surgery. The aim of the study was to identify a variant coronary artery among cadaver hearts in Ethiopia. A descriptive, laboratory-based, observational study was conducted. A total of thirty cadaver hearts were obtained from the Department of Anatomy in different medical schools of Ethiopia. The median arteries were identified in 43.3% of the specimens. The myocardial bridge was found in three (10% of the heart) of the median arteries. The presence of myocardial bridge was significantly associated with median artery (p-value <0.05). The conus artery or third coronary artery arose separately from right aortic sinus and nourished the proximal outflow part of the right ventricle in 6.7% of the heart. Mostly (66.7%), the sino-atrial nodal artery was originated from the right coronary artery. The right coronary artery was dominant in 63.3%, while the left coronary artery was dominated in 23.3% and the rest was co-dominant. This study identified important coronary artery variation among Ethiopian ethnic group.
Keywords: Coronary artery, Variation, Cadaver, Heart