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Mitral valve endocarditis in hypertrophic cardiomyopathy: case report and literature review

G Morgan-Hughes1, J Motwani

  • 1Cardiology Department, South West Cardiothoracic Unit, Plymouth NHS Trust, Plymouth PL6 8DH, UK. hughesgj@talk21.com

Heart (British Cardiac Society)
|May 16, 2002
PubMed

Insights

Mitral endocarditis is a rare complication in patients with hypertrophic obstructive cardiomyopathy, typically affecting the anterior mitral valve leaflet. This case highlights Staphylococcus aureus endocarditis in a young man, discussing treatment options.

Area of Science:

  • Cardiology
  • Infectious Diseases
  • Cardiovascular Surgery

Background:

  • Hypertrophic cardiomyopathy (HCM) is a genetic heart muscle disease.
  • Mitral valve endocarditis is a rare but serious complication, particularly in patients with obstructive HCM.
  • Outflow tract obstruction is a key factor in the pathogenesis of mitral valve endocarditis in HCM.

Observation:

  • This report details a case of community-acquired Staphylococcus aureus mitral valve endocarditis.
  • The patient was a previously asymptomatic young man with hypertrophic obstructive cardiomyopathy.
  • Endocarditis predominantly affected the left ventricular aspect of the anterior mitral valve leaflet.

Findings:

  • The cumulative 10-year probability of developing endocarditis in patients with obstructive HCM is less than 5%.
  • Surgical intervention, including combined mitral valve replacement and septal myectomy, has been reported for this condition.
  • The case underscores the importance of considering endocarditis in young, otherwise asymptomatic patients with HCM.

Implications:

  • Early recognition and prompt management of mitral endocarditis are crucial in patients with HCM.
  • Treatment strategies may involve medical management, surgical intervention, or a combination of both.
  • Further research is needed to optimize treatment protocols and improve outcomes for this rare complication.

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