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Related Experiment Video

Updated: Aug 2, 2025

Isolation of Valvular Endothelial Cells
11:04

Isolation of Valvular Endothelial Cells

Published on: December 29, 2010

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Case Report: Culture-negative Prosthetic Valve Endocarditis.

Ignacio D Velazquez1, Kenneth K Woo1, Mohammed Siddiqui1

  • 1Division of Cardiology, Harbor-UCLA Medical Center, Torrance, CA, USA.

Current Cardiology Reviews
|April 14, 2023
PubMed
Summary

Diagnosing culture-negative prosthetic valve endocarditis is challenging due to unreliable imaging and difficult organism identification. This case highlights the critical need for a high index of suspicion and alternative diagnostic methods for prosthetic valve endocarditis.

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Area of Science:

  • Cardiology
  • Infectious Diseases
  • Medical Diagnostics

Background:

  • Prosthetic valve endocarditis (PVE) presents diagnostic challenges, leading to significant morbidity and mortality, particularly when cultures are negative.
  • Standard diagnostic tools like echocardiography may be less reliable in PVE due to artifacts and post-surgical changes.
  • Culture-negative PVE is difficult to manage due to the lack of targeted antimicrobial therapy and potential delays in identifying fastidious causative organisms.

Observation:

  • A patient with dyspnea developed culture-negative endocarditis requiring mitral and aortic valve replacement.
  • The patient subsequently developed culture-negative prosthetic valve endocarditis.
  • Identifying the causative organism for timely antimicrobial treatment was significantly hindered.

Findings:

Keywords:
Fungal endocarditisaspergillus endocarditisculture-negative infective endocarditisprosthetic valve endocarditistransesophageal echocardiogramstreatment.

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  • Culture-negative PVE poses a significant diagnostic and therapeutic challenge.
  • Echocardiography may have reduced accuracy in diagnosing PVE.
  • Failure to identify the causative organism led to delayed treatment and adverse outcomes.

Implications:

  • A high index of suspicion is crucial for managing PVE.
  • Alternative diagnostic methods beyond cultures and echocardiography may be necessary for PVE.
  • Timely diagnosis and targeted antimicrobial therapy are critical for improving outcomes in PVE.