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Aorto-cavitary fistula: a complication of infective endocarditis

S Williams-Phillips1

  • 1Thai Wing, Andrews Memorial Hospital Ltd, 27 Hope Road, Kingston 10, Jamaica, West Indies. sandrap@cwjamaica.com

The West Indian Medical Journal
|April 30, 2013
PubMed

Insights

Aorto-cavitary fistulae, rare in infective endocarditis, pose diagnostic challenges. This case highlights the need for high suspicion, as standard criteria may miss right ventricular fistulae.

Area of Science:

  • Cardiology
  • Infectious Diseases
  • Medical Imaging

Background:

  • Aorto-cavitary fistulae are uncommon but serious complications of infective endocarditis.
  • Diagnosis is often difficult, especially when typical signs like valve disease or positive blood cultures are absent.
  • These fistulae have significant implications for patient prognosis and treatment strategies.

Observation:

  • This case report details a patient with infective endocarditis presenting with an aorto-cavitary fistula.
  • The fistula was specifically identified as originating from the right sinus of Valsalva and extending to the right ventricle.
  • Transthoracic echocardiography was instrumental in visualizing this rare anatomical connection.

Findings:

  • The Modified Duke Criteria, a standard diagnostic tool, demonstrated limited sensitivity in this specific case.
  • The presence of a right sinus of Valsalva to right ventricle fistula was confirmed despite potential ambiguities in the diagnostic criteria.
  • This finding underscores the need for advanced imaging in complex endocarditis cases.

Implications:

  • The findings challenge the universal applicability of the Modified Duke Criteria for diagnosing aorto-cavitary fistulae.
  • Accurate diagnosis of such fistulae is critical for patient prognosis and treatment strategies.
  • This case emphasizes the importance of echocardiography in elucidating complex cardiac anatomy and pathology in infective endocarditis.

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