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Serial changes of hemodynamic performance with Medtronic Hall valve in aortic position

Yang Hyun Cho1, Dong Seop Jeong, Pyo Won Park

  • 1Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.

The Annals of Thoracic Surgery
|January 25, 2011
PubMed

Insights

The Medtronic Hall valve in aortic position can show increased pressure gradients over time, particularly after double valve replacement or with smaller valve sizes. This finding is crucial for long-term hemodynamic performance monitoring.

Area of Science:

  • Cardiovascular Surgery
  • Biomedical Engineering
  • Clinical Cardiology

Background:

  • The Medtronic Hall valve is a mechanical prosthetic used in aortic valve replacement (AVR).
  • Long-term hemodynamic performance of prosthetic valves is critical for patient outcomes.

Purpose of the Study:

  • To evaluate the long-term hemodynamic performance of the Medtronic Hall valve in the aortic position.
  • To analyze serial changes in echocardiographic outcomes following AVR with this valve.

Main Methods:

  • Retrospective study of 117 patients undergoing AVR with Medtronic Hall valve (1997-2004).
  • Patients were divided into isolated AVR and double valve replacement groups.
  • Serial echocardiographic data were analyzed over a mean follow-up of 93.7 months.

Main Results:

  • 11.1% of patients experienced an aortic transprosthetic mean pressure gradient increase >15 mm Hg.
  • Double valve replacement and small valve size (20 mm) predicted this gradient increase.
  • Adverse cardiac event-free survival at 10 years was significantly better in the isolated AVR group (80.1% vs. 53.8%).

Conclusions:

  • The transprosthetic mean pressure gradient of the Medtronic Hall valve frequently increases over time in the aortic position.
  • This gradient increase is more prevalent in patients who underwent double valve replacement, especially with small valve sizes.
  • These findings highlight the importance of monitoring hemodynamic changes in patients with Medtronic Hall valves.
Abstract

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