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Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement
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Aortic prosthesis re-replacement due to concealed stenosing subvalvular pannus ring.

M Emmert1, T Kofidis, V Didilis

  • 1Division of Thoracic and Cardiovascular Surgery, Hannover Medical School, Hannover, Germany.

The Thoracic and Cardiovascular Surgeon
|July 17, 2007
PubMed
Summary

A pannus ring causing a high transvalvular gradient in a mechanical aortic valve prosthesis was identified 16 years post-procedure. Early surgical intervention is recommended for symptomatic patients with unclear prosthetic valve dysfunction.

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Area of Science:

  • Cardiovascular Surgery
  • Cardiac Pathology
  • Prosthetic Valve Dysfunction

Background:

  • Mechanical aortic valve prostheses are common for treating aortic valve disease.
  • Long-term complications can include prosthetic valve dysfunction.
  • Pannus formation is a known, though less common, complication.

Purpose of the Study:

  • To describe a case of significant pannus formation causing stenosis in a mechanical aortic valve prosthesis.
  • To highlight the diagnostic challenges in cases of unclear transvalvular gradients.
  • To emphasize the importance of considering pannus as a differential diagnosis.

Main Methods:

  • Case report of a patient with a mechanical aortic valve prosthesis.
  • Clinical presentation of a high transvalvular gradient 16 years post-implantation.
  • Intraoperative findings and surgical intervention.

Main Results:

  • A high transvalvular gradient was detected 16 years after mechanical aortic valve prosthesis implantation.
  • Echocardiography did not reveal clear signs of the cause.
  • Intraoperative findings confirmed a stenosing pannus ring, which was excised.

Conclusions:

  • Pannus formation should be considered in patients with mechanical aortic valves presenting with unexplained high transvalvular gradients.
  • Early surgical intervention is advised for symptomatic patients with pannus-related prosthetic valve dysfunction.
  • This pathological entity requires consideration in the differential diagnosis of prosthetic valve stenosis.