Epidemiology and risk factors of infective endocarditis in a tertiary hospital in China from 2007 to 2016
Abstract Background: To explore the trends in epidemiology and risk factors related to the prognosis of infective endocarditis in a teaching hospital over the past ten years.Methods: A retrospective cohort study was performed. A total of 407 consecutive patients were included. The clinical characteristics and risk factors related to the prognosis of infective endocarditis during this period were analyzed. Results: A total of 407 patients with infective endocarditis were included, the average age was 48 ±16 years old with an increasing trend and in-hospital mortality rate was 10.6% and one-year mortality rate was 12.2%. Among patients with underlying heart disease, congenital heart disease was the most common(25.8%), followed by rheumatic heart disease which showed a decreased trend during this period (P<0.001). There were 222(54.5%) positive blood cultures and Streptococci (24.1%) was the main pathogens with an increasing trend. There were 403 patients (99%) with surgical indications, but only 234 patients (57.5%) received surgical treatment. Hemodialysis (P = 0.041, OR = 4.697, 95% CI 1.068-20.665), pulmonary hypertension (P = 0.001, OR = 5.308, 95% CI 2.034-13.852), Pitt score ≥ 4 (P <0.001, OR = 28.594, 95% CI 5.561-148.173) and vegetation length>30mm (P = 0.011, OR = 13.754, 95% CI 1.832-103.250) were independent risk factors for in-hospital mortality.Conclusions: There was no significant change in the overall incidence of infective endocarditis, the clinical features of infective endocarditis have changed slightly during the past ten years. Streptococci infective endocarditis was still the predominant. Infective endocarditis patients with hemodialysis, pulmonary hypertension, Pitt score ≥ 4 and vegetation length>30mm had an worse in-hospital outcome.