Purulent pericarditis-induced intracardiac perforation and infective endocarditis due to Parvimonas micra: a case

Hiroaki Morinaga1, Ken Kato1, Motoyuki Hisagi2

  • 1Department of Cardiology, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan.

Abstract

Insights

Purulent pericarditis caused by Parvimonas micra is rare but serious. Prompt diagnosis and aggressive treatment, including source control, are crucial for patient survival and improved outcomes in acute pericarditis.

Area of Science:

  • Cardiology
  • Infectious Diseases
  • Critical Care Medicine

Background:

  • Purulent pericarditis is a rare condition with high mortality without treatment.
  • It can lead to severe complications like tissue and organ perforation.
  • Parvimonas micra is an exceptionally rare cause of purulent pericarditis.

Purpose of the Study:

  • To report a rare case of purulent pericarditis caused by Parvimonas micra.
  • To highlight the importance of considering purulent pericarditis in refractory acute pericarditis.
  • To emphasize the necessity of aggressive management for favorable outcomes.

Main Methods:

  • A 70-year-old male presented with chest pain and symptoms of acute pericarditis.
  • Diagnosis was confirmed by pericardiocentesis revealing Parvimonas micra in pericardial fluid and blood.
  • Advanced imaging (CT, TEE) identified a pericardial abscess and right atrial vegetation/perforation.

Main Results:

  • Initial anti-inflammatory treatment failed, necessitating pericardiocentesis.
  • Parvimonas micra was identified as the causative agent.
  • Surgical intervention was required for source control, leading to clinical improvement.

Conclusions:

  • Purulent pericarditis must be suspected in acute pericarditis cases unresponsive to anti-inflammatory drugs.
  • Early and aggressive source control is vital for managing purulent pericarditis.
  • Successful treatment involved antibiotics, pericardiocentesis, and surgical intervention.

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