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Related Experiment Videos

Freestyle valve experience: technical considerations and mid-term results.

C F Sintek1, T A Pfeffer, G S Kochamba

  • 1Department of Cardiac Surgery, Kaiser Permanente Medical Center, Los Angeles, California, USA.

Journal of Cardiac Surgery
|August 10, 1999
PubMed
Summary

The Medtronic Freestyle stentless valve shows excellent hemodynamics and clinical outcomes. In a 5-year follow-up, no patients required reoperation for valve-related issues, demonstrating its safety and efficacy.

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Area of Science:

  • Cardiovascular Surgery
  • Biomaterials Science
  • Medical Devices

Background:

  • Stentless porcine aortic valves exhibit superior hemodynamics compared to stented valves.
  • The Medtronic Freestyle valve is a stentless porcine aortic valve prosthesis.
  • This study reviews the surgical techniques and clinical outcomes of the Medtronic Freestyle valve.

Purpose of the Study:

  • To describe the operative techniques for the Medtronic Freestyle valve implantation.
  • To review the 5-year clinical experience with the Medtronic Freestyle valve.
  • To evaluate the hemodynamic performance and safety of the Medtronic Freestyle valve.

Main Methods:

  • Implantation of the Medtronic Freestyle valve in 95 patients (mean age 76 years) between January 1993 and November 1997.

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  • Clinical assessment and Doppler echocardiography at 6 months, 1 year, and annually thereafter.
  • Review of operative and late outcomes, including mortality, morbidity, and valve function.

    • Main Results:

    • Excellent hemodynamic performance with decreased systolic gradients and increased effective orifice areas post-implantation.
    • Low incidence of complications: 3 operative deaths, 10 late deaths (2 cardiac, 8 noncardiac), 3 strokes, 4 transient ischemic attacks, and 4 cases of bacteremia.
    • No patient required reoperation for valve-related problems over the 5-year follow-up period.
    • 91% of patients had no or trace aortic insufficiency at discharge, with no increase over time.

    Conclusions:

    • The Medtronic Freestyle stentless valve demonstrates excellent hemodynamics and favorable clinical results.
    • The valve is associated with a low rate of complications and no need for reoperation in a 5-year follow-up.
    • This study supports the use of the Medtronic Freestyle valve in aortic valve replacement procedures.