Aortic valve replacement with omniscience and omnicarbon valves.

Area of Science:

• Cardiac Surgery
• Biomaterials Science
• Clinical Outcomes Research

Background:

• Aortic valve replacement is a critical procedure for managing severe aortic valve disease.
• Bioprosthetic heart valves are widely used, with varying clinical performance.
• The Omniscience (O-S) and Omnicarbon (O-C) valves are mechanical prostheses used in aortic valve replacement.

Purpose of the Study:

• To compare the clinical outcomes of aortic valve replacement using the Omniscience (O-S) valve versus the Omnicarbon (O-C) valve.
• To evaluate survival rates, event-free rates for thromboembolic complications, and valve-related complications between the two valve types.

Main Methods:

• Retrospective analysis of 100 aortic valve replacements with O-S valves (1980-1985) and 100 with O-C valves (1985-1989).
• Inclusion of concomitant procedures, such as mitral valve replacement, in 63 O-S and 67 O-C patients.
• Cumulative follow-up of 559 patient-years for O-S and 273 patient-years for O-C, assessing 4-year actuarial rates.

Main Results:

• Overall 4-year survival rates were 82% (O-S) and 89.5% (O-C); for isolated aortic valve replacement, 82.9% (O-S) and 91.9% (O-C).
• 4-year event-free rates for thromboembolism were 88.8% (O-S) and 94.4% (O-C) overall, and 89.2% (O-S) and 95.9% (O-C) for isolated procedures.
• The overall rate of valve-related complications was significantly lower in the O-C group (89.3%) compared to the O-S group (78.8%) (p < 0.05).

Conclusions:

• The Omnicarbon (O-C) valve demonstrated a superior valve-related complication profile compared to the Omniscience (O-S) valve.
• Patients undergoing aortic valve replacement with the O-C valve experienced better outcomes regarding valve-related complications.
• These findings suggest that the O-C valve may be a preferable choice for aortic valve replacement due to its improved safety profile.