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Related Experiment Video

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Simultaneous 3D Analysis of Cardiac Damage and Immune Response in Reperfused Acute Myocardial Infarction Using Light Sheet Fluorescence Microscopy
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Molecular imaging in Libman-Sacks endocarditis.

Anders Dahl1, Bente K Schaadt, Eric Santoni-Rugiu

  • 1From the 1 Department of Cardiology.

Infectious Diseases (London, England)
|January 28, 2015
PubMed
Summary
This summary is machine-generated.

This case study highlights a patient with systemic lupus erythematosus (SLE) and Libman-Sacks endocarditis. (18)F-FDG-PET-CT imaging showed mitral valve inflammation but could not differentiate it from infective endocarditis.

Keywords:
EndocarditisLibman-Sacksculture-negative endocarditismolecular imaging

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Area of Science:

  • Cardiology
  • Rheumatology
  • Nuclear Medicine

Background:

  • Systemic lupus erythematosus (SLE) can manifest with cardiac complications, including endocarditis.
  • Libman-Sacks endocarditis is a non-infective valvular manifestation of SLE.
  • Distinguishing Libman-Sacks endocarditis from culture-negative infective endocarditis (IE) poses a clinical challenge.

Observation:

  • A 54-year-old woman with SLE presented with fever, pericardial effusion, and a mitral valve vegetation.
  • (18)F-Fluorodeoxyglucose positron emission tomography CT ((18)F-FDG-PET-CT) revealed intense radiotracer uptake at the mitral valve.
  • Surgical pathology confirmed Libman-Sacks vegetations, with negative microbiological workup.

Findings:

  • (18)F-FDG-PET-CT demonstrated significant glucose metabolism in the mitral valve vegetation, indicative of inflammation.
  • The imaging findings were consistent with increased white blood cell infiltration.
  • Despite characteristic imaging, microbiological tests were negative, supporting a non-infective etiology.

Implications:

  • This case underscores the utility of (18)F-FDG-PET-CT in visualizing inflammatory processes in non-infective endocarditis.
  • However, (18)F-FDG-PET-CT cannot reliably differentiate Libman-Sacks endocarditis from culture-negative infective endocarditis.
  • Further research is needed to refine diagnostic tools for differentiating these conditions.