Mid-term Outcomes in Nonelderly Adults Undergoing Surgery for Isolated Aortic Valve Infective Endocarditis: Results From Two Canadian Centers

Background Little is known about the mid-term prognosis of nonelderly patients (≤60 years) after the surgical treatment of isolated aortic valve infective endocarditis (IE). Better characterization of these outcomes could help in tailoring the surgical management in these patients. Methods From 2000 to 2015, 164 adult patients ≤60 years of age (mean 46 ± 11 years, 81% male) underwent surgical treatment for isolated aortic valve IE in 2 high-volume Canadian centers. Twenty-three patients (14%) were intravenous drug users (IVDUs). Patients with recurrent IE or concomitant endocarditis on other valves were excluded. The aortic valve was replaced with a mechanical prosthesis (44%), a tissue valve (30%), a homograft (18%), or a Ross procedure (9%). Mean follow-up was 6.2 ± 4.6 years (92% complete). Results Thirty-day mortality was 7%. Actuarial survival rates at 5 and 10 years were 80 ± 3% and 71 ± 4%, respectively. IVDU (hazard ratio [HR] 3.8, 95% CI 1.4-10.1; P = 0.01) and prosthetic valve endocarditis (HR 2.6, 95% CI 1.1-6.4; P = 0.04) were associated with increased mid-term mortality. Mid-term survival was best in non-IVDU patients with native valve endocarditis, yet lower than a matched elective aortic valve replacement (AVR) population. Overall, freedom from recurrence of IE at 1, 5, and 10 years was 94 ± 2%, 91 ± 3%, and 89 ± 3%, respectively. IVDU was associated with higher rates of recurrence, especially in the first year after surgery. Conclusions In nonelderly adults undergoing surgery for aortic valve IE, mid-term survival is suboptimal. Although non-IVDU patients with native valve endocarditis have better mid-term outcomes, survival remains lower than a matched population of elective AVR in nonelderly patients.