Right coronary artery‐coronary sinus fistula is a very rare congenital anomaly in which a right coronary artery fistula drains into the right atrium, right ventricle, or pulmonary artery. A right coronary artery‐coronary sinus fistula was diagnosed in a 44‐year‐old man by three‐dimensional echocardiography and confirmed by computed tomography angiography and surgery. Relevant published experience in diagnosing this kind of anomaly is summarized.
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