Ten-year experience with pericardial xenograft valves

Area of Science:

• Cardiovascular Surgery
• Biomaterials Science
• Clinical Outcomes Research

Background:

• Bovine pericardial xenografts are utilized in cardiac valve replacement surgery.
• Evaluating the long-term efficacy and safety of these bioprosthetic valves is crucial for patient management.

Purpose of the Study:

• To assess the long-term outcomes, including survival, thromboembolism, and durability, of bovine pericardial xenografts in a large patient cohort.

Main Methods:

• A retrospective analysis of 553 pericardial xenografts implanted in 520 patients over a 9-year period.
• Data collection focused on mortality rates, thromboembolic events, and valve-related complications.

Main Results:

• The study reported a low annual mortality rate of 1.8% and an actuarial survival rate of 73.0% +/- 12% at 10 years.
• A low incidence of thromboembolism (0.41% per annum) was observed, negating the need for permanent anticoagulation.
• Actuarial valve durability was estimated at 75.0% +/- 8.8% at 10 years, though long-term degeneration remains a consideration.

Conclusions:

• Bovine pericardial xenografts offer acceptable long-term survival and a low risk of thromboembolism without anticoagulation.
• The trade-off between potential durability limitations and the benefits of avoiding anticoagulation is considered favorable in this study.