Infective Endocarditis Diagnosis and Management Open access Peer reviewed

Should valve leaflet thickening be considered a characteristic lesion of infective endocarditis?

Γεώργιος Τζίμας, Pierre Monney, Nicoleta Ianculescu, Panagiotis Antiochos and 4 more

Clinical Infectious Diseases | Aug 30, 2026

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Valve leaflet thickening is a frequent but non-specific imaging finding that substantially reduces diagnostic specificity when incorporated into the 2023 Duke-ESC clinical criteria.

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BACKGROUND: Valve leaflet thickening was recently incorporated into the 2023 version of the Duke criteria by the European Society of Cardiology (ESC) as a potential imaging marker of infective endocarditis (IE). The study aimed to assess the impact of valve leaflet thickening on the diagnosis of IE among patients investigated for suspected IE. METHODS: This retrospective study included adults with suspected IE at Lausanne University Hospital (2014-2025). IE was diagnosed by the 2023 Duke-ISCVID based on the clinical, pathological, and rejection criteria. Reclassification of IE status was assessed according to the 2023 Duke-ESC clinical criteria with and without inclusion of leaflet thickening. RESULTS: Among 3,747 episodes of suspected IE, valve leaflet thickening was identified in 288 (8%). IE was diagnosed in 193/288 (67%) episodes. Among the 193 IE episodes, 62 (32%) showed no additional intracardiac lesion typically associated with IE. When leaflet thickening was excluded from imaging criteria, 144 episodes (50%) still fulfilled a major imaging criterion according to the 2023 Duke-ESC clinical criteria. Incorporation of leaflet thickening into the 2023 Duke-ESC clinical criteria increased sensitivity from 59% (95% CI: 52-66%) to 79% (95% CI: 73-85%), while specificity decreased from 98% (95% CI: 93-100%) to 46% (95% CI: 36-57%). CONCLUSIONS: Valve leaflet thickening is a frequent but non-specific imaging finding that substantially reduces diagnostic specificity when incorporated into the 2023 Duke-ESC clinical criteria. Its use as a major imaging criterion risks overdiagnosis and overtreatment, underscoring the need for cautious interpretation within a multidisciplinary diagnostic framework.

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Γεώργιος Τζίμας

first | University of Lausanne | ORCID 0000-0002-2810-8887

Pierre Monney

middle | University of Lausanne | ORCID 0000-0002-3083-7333

Nicoleta Ianculescu

middle | University of Lausanne

Panagiotis Antiochos

middle | University of Lausanne | ORCID 0000-0001-8466-7360

Benoit Guery

middle | University of Lausanne

Lars Niclauss

middle | University of Lausanne | ORCID 0000-0003-4453-5202

Matthias Kirsch

middle | University of Lausanne | ORCID 0000-0002-9213-7578

Matthaios Papadimitriou‐Olivgeris

last | Hôpital du Valais | ORCID 0000-0003-0565-5105

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BibTeX

@article{2026Should,
  title = {Should valve leaflet thickening be considered a characteristic lesion of infective endocarditis?},
  author = {Γεώργιος Τζίμας and Pierre Monney and Nicoleta Ianculescu and Panagiotis Antiochos and Benoit Guery and Lars Niclauss and Matthias Kirsch and Matthaios Papadimitriou‐Olivgeris},
  journal = {Clinical Infectious Diseases},
  year = {2026},
  doi = {10.1093/cid/ciag524},
  url = {https://doi.org/10.1093/cid/ciag524}
}

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