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Introduction. Congenital heart disease (CHD) is the most common type of birth defect today. The adult congenital heart disease (ACHD) population is constantly growing and becoming older and more patients require cardiac surgery. The objective of this study was to review the surgical outcome of the open heart procedures performed on ACHD patients in the last 10 years at Sahlgrenska University Hospital (SUH) through a retrospective descriptive cohort study. Methods. A retrospective data collection was performed for 421 patients who underwent a total of 439 surgical procedures between 2009 and 2018 at the Cardiothoracic department in SUH. The primary outcomes were early (Results. 30-day mortality was 1.9%. Long-term survival after 3, 5 and 10 years were 96% �� 1, 94.3% �� 1.3 and 92.4% �� 1.8. 82 major complications occurred after 46 procedures (11.6%). The most common major complication was re-exploration due to hemorrhage. Risk factors for major complications were acute surgery and prolonged extracorporeal circulation time. 173 minor complications occurred after 90 procedures (22.5%). The most common minor complication was prolonged intensive care unit stay (>48 h). Conclusion. This study presents satisfactory early and midterm survival. The survival and frequency of major postoperative complications are well in line with what other studies have presented. Patients undergoing resternotomies had no increased risk for mortality or postoperative complications.