Day0 (admission)	A 41-year-old man complained occasional dizziness for 2 years, palpitations for 2 months.
Day 1	Chest X-ray: enlarged cardiac silhouette with local protrusion of the right margin. Transthoracic echocardiography: preliminarily revealed the dilated right coronary artery (RCA), which connected to the left ventricle near the posterior mitral valve root through a fistula.
Day 2	Three-dimensional coronary artery computed tomography: visualized the giant tortuous RCA and the position of the fistula orifice.
Day 5	Coronary angiography: further confirmed the abnormal structures and excluded any stenosis or occlusion in other coronary arteries.
Day 15	The patient received surgical treatment, including repairment of the RCA-left ventricular fistula, resection and reconstruction of the dilated RCA and coronary artery bypass grafting under hypothermic cardiopulmonary bypass.
Day 22	Hospital discharge.
1-year follow-up	No adverse clinical events were reported.