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Endocarditis After Transcatheter Pulmonary Valve Replacement.

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Endocarditis is a significant risk after transcatheter pulmonary valve replacement (TPVR) for right ventricular outflow tract anomalies. Younger age at implant and higher post-implant gradients increase endocarditis risk in these patients.

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Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Congenital Heart Disease

Background:

  • Endocarditis is a serious complication in patients with congenital heart defects affecting the right ventricular outflow tract (RVOT).
  • Prosthetic valves in the RVOT are particularly susceptible to endocarditis.

Purpose of the Study:

  • To assess the incidence and risk factors of endocarditis following transcatheter pulmonary valve replacement (TPVR).
  • To analyze outcomes in patients who received a transcatheter pulmonary valve (TPV) in prospective trials.

Main Methods:

  • Analysis of a cohort of 309 patients who underwent TPVR in three prospective multicenter studies.
  • Diagnosis of endocarditis and TPV involvement was confirmed by the implanting investigator.
  • Median follow-up of 5.1 years, totaling 1,660.3 patient-years of observation.

Main Results:

  • Endocarditis occurred in 46 patients (3.1% per patient-year), with 35 cases of TPV-related endocarditis (2.4% per patient-year).
  • At 5 years post-TPVR, freedom from endocarditis was 89% and from TPV-related endocarditis was 92%.
  • Factors associated with increased endocarditis risk included age ≤12 years at implant and a post-implant peak gradient ≥15 mm Hg.

Conclusions:

  • Endocarditis is a critical adverse event after TPVR in patients with congenital heart disease and RVOT anomalies.
  • Understanding and managing endocarditis is crucial for optimizing TPV therapy outcomes.
  • Ongoing research and surveillance are vital for improving patient care and TPV utilization.