A 22-year-old woman with double inlet left ventricle had had two systemic-pulmonary shunting procedures for incorrect or incomplete diagnoses. Echocardiography with indocyanine green contrast studies demonstrated a double inlet "left" ventricle. It also localized the bulboventricular septum and infundibular chamber anterior to the two atrioventricular valves, and demonstrated early communication of contrast from the right atrium to the ventricle and infundibular chamber.