Résumé
A 2-month-old girl had been urgently seen on postnatal day 10 due to poor weight gain and tachypnea. Echocardiography showed congenital valvular aortic stenosis (AS), ventricular septal defect (VSD), atrial septal defect (ASD), and aortic valve dysplasia, but no cyst image was seen at the aortic valve level. Aortography revealed a dysplastic aortic valve along with coarctation of aorta (CoA) and patent ductus arterious (PDA). Balloon aortic valvotomy (BAV) was performed on day 53. Ballooning was satisfactory, but there was no change in gradient. Operation was performed on day 70 under a diagnosis of congenital AS and CoA complex. After cardiopulmonary bypass was established, the ascending aorta was transected. The blood cyst originated from the center of the anterior leaflet and was resected. The pressure gradient at the aortic valve decreased to 22.5mmHg. The patient was discharged 25 days after surgery.