OC80 THE ROLE OF SURGICAL TECHNIQUE ON LONG-TERM OUTCOMES OF TETRALOGY OF FALLOT REPAIR: A MULTICENTER STUDY

Abstract

Abstract Background and Aim: to evaluate clinical outcomes of patients undergoing Tetralogy of Fallot (ToF) repair, focusing on the type of surgical strategy performed. Methods: a retrospective clinical review of patients undergoing ToF repair in six centers. Excluded were ToF with pulmonary atresia or aplasia, and double-outlet right ventricle. Results: between 1990 and 2015, 720 patients underwent ToF repair (M/F 57%/43%; median age 5,9months, IQ range 3,8–11,5); 132 (18%) had preoperative cyanotic spells; 111 (15%) received previous palliative surgery. Repair was achieved by transatrial approach (TA) in 433 patients (60,1%), and transventricular (TV) in the remaining ones. The pulmonary valve (PV) was saved in 249 (34,6%), while, in the remaining patients, RVOT reconstruction was performed by means of a transanular patch (60,8%), or a conduit (4,6%). Major postoperative complications occurred in 247 (34,0%). Early mortality was 3%. At 20-year follow-up (completeness 86%), 10 (2%) patients died, 39 (7%) required surgical reoperation, and 72 (12%) an interventional procedure. There were no significant differences between TA and TV approaches, in terms of early mortality and onset of adverse events (interventional procedures, surgical reoperations and mortality) at follow-up. When PV was saved, there was a lower rate of postoperative complications and early mortality, and a lower rate of overall adverse events (Figure 1, p < 0,05). Conclusions: ToF repair in infancy is confirmed to be a safe procedure, with good late clinical outcomes. PV preservation at repair is associated with lower early morbidity and mortality, and a lower rate of adverse events at long-term follow up.