Surgical Closure of Atrial Septal Defect in Patients Older than 30 Years: Risk Factors for Late Death from Arrhythmia or Heart Failure - Hörer, J; Müller, S; Schreiber, C; Kostolny, M; Cleuziou, J; Prodan, Z; Holper, K; Lange, R (The Thoracic and Cardiovascular Surgeon, 2007)