Abstract 1852: The Association Between Perioperative Complications, Intermediate Survival and Use of Aprotinin During Isolated Coronary Bypass Grafting Surgery

Abstract

Introduction: Aprotinin during CABG has been linked to increased rates of perioperative complications and increased long-term mortality. We report our results for the association of CABG, aprotinin use and intermediate survival. Methods: Subjects were 1,679 isolated CABG, on-pump, cases with no prior hx of renal failure or dialysis between 2001 and 2002. Aprotinin pts were additionally propensity matched to non-aprotinin pts to control for pt acuity. Increased EuroSCORE (E) indicates increased pt acuity. Results: Aprotinin pts (n=817) presented as older (63.7 vs. 61.2, p=0.05), increased E (6.5 vs. 4.1, p=0.05), and urgent operative status (61.7% vs. 41.6%, p=0.05). This group experienced greater rates of perioperative prolonged ventilation (8.7%% vs. 4.8%, p=0.01), acute renal failure (4.3% vs. 2.0%, p=0.01), 30d mortality (2.2% vs. 1.0%, p=0.06) and signif. decreased unmatched 5-year survival (86.1%, vs. 92.8%, p=0.001). Aprotinin use was not signif. assoc. with increased intermediate mortality (HR: 1.26; 95% CI: 0.66–2.41) but cases with high E (6+) were (HR: 5.47; 95% CI: 2.98–10.08). Moderate E was not signif. assoc. with mortality (HR: 1.75; 95% CI: 0.91–3.35) nor was any aprotinin-E interaction term (HR: 1.00; 95% CI: 0.93–1.08). After matching, controls were signif. less at risk of mortality at 5 years, (91.3% vs. 88.1%, p=0.05; Figure 1 ). Conclusions: Our results suggest that pts with aprotinin experienced higher rates of perioperative complications; however, the pts in this group were generally at higher risk for adverse outcome. Aprotinin use may convey an increased risk of intermediate mortality, but after matching, mortality estimates are greatly reduced.