Neoaortic bicuspid valve in arterial switch operation: mid-term follow-up.

Background: We sought to identify the prevalence of bicuspid pulmonary valve among patients with transposition of the great arteries undergoing the arterial switch operation and evaluate functional integrity of that valve in the neoaortic position.

Methods: Between October 1985 and December 2001, 391 patients had an arterial switch operation for transposition and its variants. Perioperative information and follow-up data were available for 342 patients.