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

AbstractBACKGROUND:
Many studies have demonstrated the superior hemodynamics of stentless porcine aortic valves compared to stented valves. This article describes the operative techniques and reviews our 5-year experience with the Medtronic Freestyle stentless valve.
METHODS:
Between January 1993 and November 1997, 95 patients underwent implantation of the Medtronic Freestyle valve at a mean age of 76 years. All patients were seen at 6 months, 1 year, and annually thereafter for clinical assessment and Doppler echocardiography.
RESULTS:
There were three operative and ten late deaths (two cardiac and eight noncardiac). Three strokes and four transient ischemic attacks occurred in the follow-up period. Four patients had bacteremia that was treated successfully with antibiotics. No patient required reoperation for valve-related problems. Serial echocardiograms revealed a decrease in mean systolic gradients across the valve during the first year and an increase in effective orifice areas. Ninety-one percent of patients had no, or trace, aortic insufficiency at the time of discharge and this has not increased over time.
CONCLUSION:
The Medtronic Freestyle valve has excellent hemodynamics and good clinical results. In our experience, no patient has required reoperation in a 5-year follow-up.
AuthorsC F Sintek, T A Pfeffer, G S Kochamba, K L Yun, A D Fletcher, S Khonsari
JournalJournal of cardiac surgery (J Card Surg) 1998 Sep-Oct Vol. 13 Issue 5 Pg. 360-8 ISSN: 0886-0440 [Print] United States
PMID10440651 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Coated Materials, Biocompatible
  • Oleic Acids
  • Polyethylene Terephthalates
  • 2-(amino)oleic acid
Topics
  • Aged
  • Aged, 80 and over
  • Aortic Valve (diagnostic imaging, surgery)
  • Bioprosthesis
  • Coated Materials, Biocompatible
  • Echocardiography, Doppler
  • Female
  • Follow-Up Studies
  • Heart Valve Diseases (physiopathology, surgery)
  • Heart Valve Prosthesis
  • Heart Valve Prosthesis Implantation (instrumentation, mortality)
  • Humans
  • Male
  • Middle Aged
  • Myocardial Contraction
  • Oleic Acids
  • Polyethylene Terephthalates
  • Retrospective Studies
  • Survival Rate
  • Treatment Outcome

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