Surgical treatment of secundum atrial septal defect in patients older than 50 years

Andrea Donti; Angelo Pierangeli; Angelo Placci; Daniela Prandstraller; Fernando Maria Picchio; Gaetano Gargiulo; Letizia Bacchi-Reggiani; Marco Bonvicini

Surgical treatment of secundum atrial septal defect in patients older than 50 years