Successful biventricular repair following in-utero balloon dilation of critical aortic stenosis

Critical aortic stenosis (AS) with reversed aortic arch flow in the mid-trimester fetus usually evolves into hypoplastic left heart syndrome (HLHS) We report two cases of successful biventricular repair following in-utero valvuloplasty. Case 1 presented at 28 weeks with a grossly dilated poorly contracting left ventricle (LV), signs of endocardial fibroelastosis, mild mitral regurgitation (MR) (2,9 m/s), critical AS (1,7 m/s), reversed flow in the aortic arch and ascites. Transabdominal percutaneous valvuloplasty resulted in antegrade flow in the aortic arch, ascites disappeared within 7 days. Until delivery at…