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Toronto stentless aortic valve replacement in elderly patients
G J van Nooten1, F Caes, K François
1Department of Cardiac Surgery, University Hospital Ghent, Belgium.
Summary
This study shows that Toronto SPV stentless aortic heterografts offer excellent survival and improved functional class in elderly patients undergoing aortic valve replacement. Stentless valves demonstrated superior hemodynamics compared to stented valves.
Area of Science:
- Cardiovascular Surgery
- Biomaterials Science
- Geriatric Medicine
Background:
- Elderly patients (over 70) often present with severe aortic stenosis requiring valve replacement.
- Traditional stented bioprosthetic valves can have limitations in this population, including smaller valve sizes relative to body surface area.
Purpose of the Study:
- To evaluate the safety and efficacy of Toronto SPV stentless aortic heterografts in patients older than 70 years.
- To compare the hemodynamic performance and clinical outcomes of stentless versus stented aortic valves in this cohort.
Main Methods:
- Prospective implantation of Toronto SPV stentless aortic heterografts in 40 consecutive patients >70 years old.
- Follow-up assessment of survival, New York Heart Association (NYHA) functional class, and echocardiographic parameters.
- Comparison with historical data of stented valves implanted during the same period.
Main Results:
- High actuarial survival (97.5%) with significant improvement in NYHA functional class (mean 1.5) post-implantation.
- Stentless valves were implanted at a larger average size (25.5 mm vs. 22.3 mm) compared to stented valves in an equivalent population.
- Favorable echocardiographic valvular gradients and improved hemodynamics were observed, particularly at 6 months post-implantation.
Conclusions:
- Toronto SPV stentless aortic heterografts provide excellent clinical outcomes and hemodynamic benefits in elderly patients with aortic stenosis.
- The use of larger stentless valves addresses limitations associated with smaller stented valves in this patient group, leading to improved functional status.