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Related Experiment Videos

Prosthetic valve obstruction: thrombolysis versus operation

N Vitale1, A Renzulli, F Cerasuolo

  • 1Institute of Cardiac Surgery, Medical School, Monaldi Hospital, Second University of Naples, Italy.

The Annals of Thoracic Surgery
|February 1, 1994
PubMed
Summary

Thrombosis of mechanical heart valves is dangerous. Recombinant tissue-type plasminogen activator (rt-PA) successfully treated 8 patients with prosthetic valve thrombosis, restoring normal function without deaths or major complications.

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Area of Science:

  • Cardiology
  • Cardiovascular Surgery
  • Medical Devices

Background:

  • Acute obstruction of mechanical heart valve prostheses is a life-threatening complication.
  • Causes include fresh clot formation, fibrous tissue overgrowth, or both.
  • Appropriate treatment selection is critical for patient outcomes.

Purpose of the Study:

  • To evaluate the efficacy and safety of thrombolysis with recombinant tissue-type plasminogen activator (rt-PA) for mechanical prosthetic valve thrombosis.
  • To compare thrombolysis outcomes with surgical management in a historical cohort.

Main Methods:

  • Retrospective analysis of 28 patients with mechanical prosthetic valve thrombosis managed between January 1991 and July 1992.
  • Eight patients were treated with rt-PA thrombolysis based on specific criteria (recent symptoms, echocardiographic evidence, preserved valve function).

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  • Twenty patients underwent surgical intervention.

    • Main Results:

    • Thrombolysis with rt-PA restored normal valve function in all 8 treated patients.
    • No deaths or neurological complications occurred in the thrombolysis group; one minor peripheral embolism was noted.
    • Surgical treatment in 20 patients resulted in one operative death.

    Conclusions:

    • Recombinant tissue-type plasminogen activator (rt-PA) thrombolysis is a safe and effective treatment option for primary mechanical prosthetic valve thrombosis.
    • Thrombolysis may offer an alternative to surgery, potentially avoiding operation-related risks.
    • Careful patient selection is essential for successful thrombolytic therapy.