Occlusion of A Congenital Right Coronary to Vena Cava Superior Fistula Induces Temporary Junctional Bradycardia and Atrial Fibrillation ☆

The finding of a congenital right coronary–to–vena cava superior (RCVCS) fistula is extremely rare. The overall prevalence of coronary artery fistulae is 0.02%–0.9%,1,2 of which the coronary-to–pulmonary artery fistula is the most common type (78%) and the coronary-to–vena cava superior fistula the least common (1.8%). Symptoms such as dizziness, palpitations, angina, reduced exercise capacity, and/or fatigue may accompany this phenomenon, but most coronary fistulae are asymptomatic.