Infective Endocarditis and Antimicrobial Timing: A Case for Delay? - Summary - MDSpire

Infective Endocarditis and Antimicrobial Timing: A Case for Delay?

  • By

  • Elisavet Stavropoulou

  • Bruno Ledergerber

  • Nicolas Fourré

  • Virgile Zimmermann

  • Jana Epprecht

  • Nicoleta Ianculescu

  • Pierre Monney

  • Georgios Tzimas

  • Michelle Frank

  • Laurence Senn

  • Lars Niclauss

  • Matthias Kirsch

  • Mathias Van Hemelrijck

  • Omer Dzemali

  • Benoit Guery

  • Barbara Hasse

  • Matthaios Papadimitriou-Olivgeris

  • October 7, 2025

  • 0 min

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Objective:

To evaluate the impact of delaying antimicrobial treatment on survival among patients with suspected and confirmed infective endocarditis (IE), particularly in clinically stable patients where immediate treatment is uncertain.

Key Findings:
  • Among 1230 episodes, 55% received immediate antimicrobial treatment (Group I) and 45% deferred treatment (Group D).
  • 30-day mortality was 5% in both groups, indicating no significant difference (5% vs 5%; P = .894).
  • In confirmed IE cases, the composite primary endpoint occurred in 26% of episodes, with no significant difference between groups (28% vs 24%; P = .304), underscoring the need for further investigation.
Interpretation:

Deferring antimicrobial treatment in clinically stable patients with suspected IE did not lead to worse clinical outcomes compared to immediate treatment, suggesting a potential shift in clinical practice.

Limitations:
  • The study was retrospective and conducted at only two centers, which may limit generalizability to broader populations.
  • Exclusion of patients with severe conditions may affect the applicability of findings to all IE patients, particularly those with more complex presentations.
Conclusion:

In clinically stable patients with suspected infective endocarditis, delaying antimicrobial treatment until blood culture results are available does not adversely affect clinical outcomes, challenging existing guidelines.

Original Source(s)

Infective Endocarditis and Antimicrobial Timing: A Case for Delay?

  • by Elisavet Stavropoulou, Bruno Ledergerber, Nicolas Fourré, Virgile Zimmermann, Jana Epprecht, Nicoleta Ianculescu, Pierre Monney, Georgios Tzimas, Michelle Frank, Laurence Senn, Lars Niclauss, Matthias Kirsch, Mathias Van Hemelrijck, Omer Dzemali, Benoit Guery, Barbara Hasse, Matthaios Papadimitriou-Olivgeris

  • October 7, 2025

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