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Bioprosthetic valve longevity in the elderly: an 18-year longitudinal study
D F Pupello1, L N Bessone, S P Hiro
1St. Joseph's Heart Institute, Tampa, Florida, USA.
The Annals of Thoracic Surgery
|August 1, 1995
Summary
Bioprosthetic valve durability in elderly patients (70+) remains crucial. This study found porcine bioprosthetic valves show significant durability, with structural deterioration being the primary failure mode in long-term follow-up.
Area of Science:
- Cardiovascular Surgery
- Biomaterials Science
- Geriatric Medicine
Background:
- Bioprosthetic valve durability is critical for the growing elderly population needing valve replacement.
- Previous research indicated over 83% durability at 13 years for patients aged 70+.
- Limited data exists beyond 13 years, necessitating further investigation.
Purpose of the Study:
- To evaluate the long-term durability of porcine bioprosthetic valves in patients aged 70 years and older.
- To identify the primary causes of valve failure in this specific demographic.
Main Methods:
- Retrospective analysis of 1007 patients (≥70 years) who underwent valve replacement with porcine bioprostheses.
- Data collected from September 1974 to April 1994.
- Follow-up extended up to 18.8 years, accumulating 4232.3 patient-years.
Main Results:
- 31 valve failures were recorded among 961 valves at risk.
- Failure rates were higher in the mitral position (19) compared to the aortic position (12).
- Primary causes of failure included structural deterioration (16), prosthetic endocarditis (7), and nonstructural dysfunction (5).
Conclusions:
- Porcine bioprosthetic valves demonstrate considerable long-term durability in elderly patients (70+).
- Structural deterioration is the leading cause of valve failure over extended follow-up periods.
- Findings support the continued use of bioprosthetic valves in older patient populations, with awareness of failure modes.