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Pathology and pathogenesis of infective endocarditis in native heart valves

Gaetano Thiene1, Cristina Basso1

  • 1Institute of Pathological Anatomy, University of Padua Medical School, Padua, Italy.

Cardiovascular Pathology : the Official Journal of the Society for Cardiovascular Pathology
|September 19, 2006
PubMed

Insights

Infective endocarditis involves microbial infection of heart structures, leading to vegetations and potential complications like embolism. Early identification of at-risk patients, especially those with bicuspid aortic valves, is crucial for prophylaxis.

Area of Science:

  • Cardiovascular Pathology
  • Infectious Diseases
  • Microbiology

Background:

  • Infective endocarditis is an endovascular microbial infection affecting heart valves and intracardiac foreign bodies.
  • Characteristic lesions include vegetations (platelets, fibrin, microorganisms, inflammatory cells) and leaflet disruption.
  • The injury-thrombus-infection theory explains its pathogenesis from endothelial injury to microorganism adhesion.

Purpose of the Study:

  • To review the pathology of native valve endocarditis.
  • To discuss local and distal complications of infective endocarditis.
  • To identify at-risk cardiac conditions and patients for prophylaxis, emphasizing bicuspid aortic valves.

Main Methods:

  • Literature review of infective endocarditis pathology.
  • Analysis of pathogenetic mechanisms (injury-thrombus-infection theory).
  • Discussion of clinical risk factors and complications.

Main Results:

  • Infective endocarditis causes valvular and perivalvular destruction.
  • Distal complications include embolism, metastatic infection, and septicemia.
  • Hidden bicuspid aortic valve is a significant risk factor requiring early identification for prophylaxis.

Conclusions:

  • Understanding the pathogenesis and complications of infective endocarditis is vital.
  • Early identification and prophylaxis in at-risk patients, particularly those with bicuspid aortic valves, are essential.
  • This review highlights the importance of recognizing predisposing cardiac conditions for effective management.

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