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a Preoperative transesophageal echocardiography showing a windsock-like fistula tract originating in the right coronary sinus protruding into the right atrium (arrow). b String-shaped vegetation was attached to the tip of the windsock-like fistula. c An L-R shunt via the fistula tract was seen. LA left atrium, RA right atrium, RV right ventricle
