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Intermittent electromechanical dissociation due to mechanical prosthetic valve dysfunction.

N K Garg1, A Kapoor, N Sinha

  • 1Department of Cardiology, Sanjay Gandhi PGIMS, Lucknow, India.

The Journal of Heart Valve Disease
|July 11, 2000
PubMed
Summary

A rare case of intermittent electromechanical dissociation occurred in a patient with a mechanical mitral valve prosthesis. A filamentous structure intermittently entangled the prosthesis, resolving spontaneously with restored valve function.

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Area of Science:

  • Cardiology
  • Cardiovascular Surgery
  • Biomedical Engineering

Background:

  • Mitral valve replacement surgery carries risks, including prosthetic valve dysfunction.
  • Electromechanical dissociation is a rare hemodynamic phenomenon.
  • Suture material or thrombus can potentially interfere with prosthetic valve function.

Observation:

  • A patient developed intermittent electromechanical dissociation during normal sinus rhythm four months post-mitral valve replacement.
  • Echocardiography revealed a filamentous structure intermittently entangling the Medtronic Hall prosthesis.
  • The structure was suspected to be suture material, tissue tag, or thrombus.

Findings:

  • The patient experienced a three-week symptomatic period before spontaneous recovery.

Related Experiment Videos

  • Electromechanical dissociation and the filamentous structure resolved completely.
  • Normal prosthetic valve function was restored and maintained during follow-up.

    • Implications:

    • This case highlights a rare complication of mitral valve repair and prosthetic valve implantation.
    • It underscores the importance of echocardiographic evaluation for diagnosing prosthetic valve dysfunction.
    • Understanding such rare events can improve patient management and surgical techniques.