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Ann Thorac Surg 1998;66:829-835
© 1998 The Society of Thoracic Surgeons

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Original articles: Cardiovascular

Primum atrial septal defect in children: early results, risk factors, and freedom from reoperation

^a Division of Cardiovascular Surgery, Department of Surgery, and Division of Paediatric Cardiology, Department of Paediatrics, The Hospital of Sick Children, University of Toronto, Faculty of Medicine, Toronto, Ontario, Canada

Address reprint requests to Dr Williams, Division of Cardiovascular Surgery, The Hospital of Sick Children, 555 University Ave, Toronto, ON M5G 1X8, Canada

Presented at the Thirty-fourth Annual Meeting of The Society of Thoracic Surgeons, New Orleans, LA, Jan 26–28, 1998.

Background. Repair of primum atrial septal defect in children usually is associated with a low operative mortality, except for a subgroup of children with congestive heart failure. To determine the early mortality and incidence of reoperation in children with primum atrial septal defect, we analyzed retrospectively the results of patients who underwent repair of this defect.

Methods. Between July 1982 and December 1996, 180 children underwent repair of primum atrial septal defect. The mean age at repair was 4.6 years (median, 3.6 years; range, 1 month to 16.4 years); of the 180 children, 23 were infants less than 1 year of age. Absent or mild symptoms were present in 145 (80%), whereas 34 (20%) of children presented with severe symptoms or congestive heart failure.

Results. Early mortality occurred in 3 (1.6%); 2 were less than 1 year of age. Follow-up ranged from 2 months to 14.5 years (mean, 6 ± 4.2 years). Actuarial survival is 98% at 10 years with no late deaths. Age less than 1 year is a predictor of death. During follow-up, 17 (9%) of the 180 patients underwent reoperation, 5 of whom were in the infant group. Five underwent reoperation for subaortic obstruction, and 12 for left atrioventricular valve regurgitation of whom 11 were repaired; and 1 required valve replacement. Age and preoperative moderate-to-severe left atrioventricular valve regurgitation were predictors of reoperation.

Conclusions. Results of the repair of primum atrial septal defect during childhood are favorable. Infants have a higher risk for death and reoperation. Left atrioventricular valve insufficiency and subaortic stenosis are important late complications and can be repaired safely at reoperation.

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