Is the Prevalence of Coronary Artery Anomalies Different in Countries with Small Populations? - A Retrospective Study in Northern Cyprus.

Background: Although the prevalence of coronary artery anomalies (CAA) is due to accidental and rare discoveries, it varies between different countries or geographies. CAA are rare congenital disorders having various clinical definitions. Its prevalence varies in angiographic and autopsy series in adult populations and is approximately 1% in average. While the incidence ranges from 0.2% to 5.64% in coronary angiographic (CAG) studies, it is around 0.3% in autopsy series. We aimed to estimate the frequency of CAA in our patient population.
Methods: The coronary angiographic data of 4099 consecutive adult patients, who underwent CAG between January 2019 and December 2020, were analyzed and retrospectively studied.
Results: The mean age of the total patients who underwent CAG was 61.59 ± 13.67 years (range, 18-98 years). CAA were found in 76 patients (1.85% incidence), origin and course anomaly in 62 patients (81.6%), and coronary artery termination anomaly in 14 patients (18.4%). Separate exits of the left anterior descending (LAD) and left circumflex (LCX) coronary artery from the left sinus of Valsalva (LSV) were the most common anomalies (36.84%). Coronary artery fistulas were seen in 14 (18.42%) patients. Abnormal origin of left circumflex artery (LCX) from the right coronary artery (RCA) or right sinus valsalva (RSV) was seen in 13 (17.11%) patients. Outflow anomalies from the contralateral coronary sinus were detected in 10 (13.16%) patients.
Conclusion: The incidence and pattern of CAA in our patient population showed similarity with previous studies. Physicians should be aware of CAA that may be associated with potentially serious cardiac incidents, because recognition of these CAA is important for the decision of treatment procedures.