Bioprosthetic valve durability in the elderly: the second decade

Area of Science:

• Cardiology
• Cardiac Surgery
• Biomaterials Science

Background:

• Elderly patients increasingly require cardiac valve surgery.
• Bioprosthetic valve durability is crucial, with limited data beyond 10 years.
• Primary tissue failure risk increases after the first decade.

Purpose of the Study:

• To analyze the long-term durability of bioprosthetic valves in patients aged 70 years and older.
• To assess survival rates and failure modes of bioprosthetic valves in this specific demographic.

Main Methods:

• Retrospective analysis of 781 patients (≥70 years) who underwent bioprosthetic valve replacement from 1974-1990.
• Follow-up extended up to 186 months, totaling 3,059.9 patient-years.
• Actuarial survival analysis was performed to evaluate bioprosthetic valve performance.

Main Results:

• Actuarial survival at 7 years was 94.5% (168 valves at risk).
• Actuarial survival at 13 years was 83.7% (11 valves at risk).
• Twenty-three valves failed: 15 primary tissue failures, 7 endocarditis, 1 perivalvular leak.

Conclusions:

• Bioprosthetic valves demonstrate favorable long-term durability in elderly patients (≥70 years).
• Survival rates remain encouraging even into the second decade post-implantation.
• These findings support the continued use of bioprosthetic valves in older surgical candidates.