Related Experiment Videos
Multicenter study of stentless valve replacement in the small aortic root
U Hvass1, G M Palatianos, R Frassani
1Hopital Bichat, Paris, France.
The Journal of Thoracic and Cardiovascular Surgery
|January 27, 1999
Summary
Stentless porcine valves effectively treat elderly patients with small aortic roots, showing mild residual obstruction. These valves offer a suitable solution for aortic valve replacement in this challenging patient group.
Area of Science:
- Cardiovascular Surgery
- Biomaterials in Medicine
- Geriatric Cardiology
Background:
- Small aortic roots present surgical challenges for aortic valve replacement.
- Stentless bioprosthetic valves are an alternative to stented valves.
Purpose of the Study:
- To evaluate the clinical outcomes of stentless porcine valves in patients with small aortic roots (19- and 21-mm aortic annulus).
Main Methods:
- A multi-institutional clinical study included 171 patients with small aortic roots undergoing valve replacement.
- Patients received either 19-mm or 21-mm stentless porcine valves.
- Hemodynamic parameters and complication rates were assessed over a 6-year follow-up period.
Main Results:
- Hospital mortality was 3.5%.
- Mean gradients remained low and stable (e.g., 6-9 mm Hg) post-implantation.
- Effective orifice area was adequate (1.45-1.72 cm²), with minimal aortic regurgitation.
Conclusions:
- Stentless porcine valves are a suitable option for elderly patients with small aortic roots.
- These valves provide favorable hemodynamics with mild residual obstruction.
- The use of stentless valves in this cohort demonstrates good long-term stability.