[Balloon valvuloplasty of critical aortic stenosis performed from an umbilical access in a neonate with endocardial fibroelastosis -- a case report].

A case of percutaneous treatment of neonatal critical aortic stenosis is presented. The baby had endocardial fibroelastosis and borderline dimensions of left heart structures. Umbilical access for the anterograde approach with the use of coronary angioplasty catheter was successfully performed.