The timing of surgery influences mortality and morbidity in adults with severe complicated infective endocarditis: a propensity analysis

AIMS: To determine whether the timing of surgery could influence mortality and morbidity in adults with complicated infective endocarditis (IE). METHODS AND RESULTS: In 291 consecutive adults with definite IE who underwent surgery during the active phase, we compared those operated on within the first week of antimicrobial therapy (n=95) to those operated on later (n=191). The impact of the timing of surgery on 6-month mortality, relapses, and postoperative valvular dysfunctions (PVD) was analysed using propensity score (PS) analyses. After stratification of the cohort into quintiles based on the PS, ≤1st week surgery was associated with a trend of decrease in 6-month mortality in the quintile of patients with the most likelihood of undergoing this early surgical management quintile 5: 11% vs. 33%, odds ratio (OR)=0.18, 95% CI (confidence interval) 0.04-0.83, P=0.03. Patients of this subgroup were younger, were more likely to have Staphylococcus aureus infections, congestive heart failure, and larger vegetations. Besides, ≤1st week surgery was associated with an increased number of relapses or PVD (16% vs. 4%, adjusted OR=2.9, 95% CI 0.99-8.40, P=0.05). CONCLUSION: Surgery performed very early may improve survival in patients with the most severe complicated IE. However, a greater risk of relapses and PVD should be expected when surgery is performed very early.