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Pacemaker infective endocarditis

P Cacoub1, P Leprince, P Nataf

  • 1Department of Internal Medicine, Hôpital La Pitié-Salpétrière, Paris, France.

The American Journal of Cardiology
|September 2, 1998
PubMed
Summary
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Pacemaker endocarditis, an infection of cardiac device leads, primarily affects older adults and is often caused by Staphylococcus species. Early diagnosis and treatment, including lead removal and antibiotics, are crucial for patient outcomes.

Area of Science:

  • Cardiology
  • Infectious Diseases
  • Medical Device Infections

Background:

  • Pacemaker endocarditis is a serious complication of cardiac electronic device implantation.
  • Identifying risk factors and diagnostic challenges is crucial for managing this condition.

Purpose of the Study:

  • To investigate the clinical characteristics, diagnostic methods, causative pathogens, and outcomes of pacemaker endocarditis.
  • To evaluate the effectiveness of current treatment strategies.

Main Methods:

  • Retrospective analysis of 33 patients with confirmed pacemaker endocarditis.
  • Review of clinical data, diagnostic imaging (echocardiography, scintigraphy), microbiological cultures, and treatment outcomes.
  • Comparison of diagnostic accuracy between transthoracic and transesophageal echocardiography.

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Main Results:

  • The majority of patients were over 60 years old, with Staphylococcus epidermidis and Staphylococcus aureus being the most common pathogens.
  • Transesophageal echocardiography demonstrated significantly higher sensitivity (96%) in detecting vegetations compared to transthoracic echocardiography (2/9 patients).
  • Overall mortality was 24%, with older patients experiencing higher mortality rates.

Conclusions:

  • Pacemaker endocarditis requires prompt diagnosis and aggressive management, including device lead extraction and prolonged antibiotic therapy.
  • Transesophageal echocardiography is superior to transthoracic echocardiography for diagnosing pacemaker endocarditis.
  • Age is a significant factor influencing mortality in patients with pacemaker endocarditis.