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Updated: Sep 14, 2026

Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus (MRSA) in Rat
07:46

Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus (MRSA) in Rat

Published on: June 4, 2012

[Methicillin-resistant Staphylococcus aureus endocarditis following patch closure of ventricular septal defect]

Y Imoto1, A Sese, Y Ueno

  • 1Department of Cardiovascular Surgery, Kyushu Kosei-Nenkin Hospital, Fukuoka, Japan.

[Zasshi] [Journal]. Nihon Kyobu Geka Gakkai
|February 1, 1992
PubMed

Insights

A rare case of methicillin-resistant Staphylococcus aureus (MRSA) mediastinitis after ventricular septal defect (VSD) repair required complex reoperation. Successful treatment involved patch removal, valve repair, and re-closure, highlighting challenges in pediatric cardiac surgery.

Area of Science:

  • Cardiology
  • Infectious Disease
  • Pediatric Surgery

Background:

  • Ventricular septal defect (VSD) closure is a common pediatric cardiac procedure.
  • Patch dehiscence and subsequent infection pose significant risks.
  • Methicillin-resistant Staphylococcus aureus (MRSA) presents a treatment challenge due to antibiotic resistance.

Observation:

  • A six-month-old girl developed mediastinitis on the ninth postoperative day after VSD repair using a patch.
  • Despite initial antibiotic treatment and wound care, blood cultures remained positive, and echocardiography revealed vegetations.
  • Vegetations were found on the intracardiac patch and involved the pulmonary and tricuspid valves.

Findings:

  • Emergency open heart surgery was performed to address the extensive infection.
  • Infected tissue, including parts of the pulmonary and tricuspid valves, was removed.
  • The VSD was re-closed with a Dacron patch, and the tricuspid valve defect was repaired.

Implications:

  • This case underscores the critical need for vigilance in diagnosing and managing postoperative infections after VSD repair.
  • Aggressive surgical intervention may be necessary for complex cases involving patch infection and valve compromise.
  • Successful management requires a multidisciplinary approach, including cardiac surgery, infectious disease specialists, and intensive care.

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