Immediate and long-term results of balloon aortic valvuloplasty for critical aortic valve stenosis in newborns. A single-center experience - Rączka, Marek; Kuźma, Jacek; Król, Wanda; Weryński, Piotr; Rudziński, Andrzej; Skalski, Janusz Hieronim; Góreczny, Sebastian (Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery, 2025)