Key result
Mechanical valves have a low incidence of reoperation for pannus (0.24%/patient-year) and thrombosis (0.15%/patient-year), with bileaflet prostheses showing an 83% risk reduction for thrombosis.
Cohort (n=2,680)
Mechanical valves have a low incidence of reoperation, but reoperation for acute thrombosis carries a significantly higher perioperative mortality risk compared to pannus.
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Historical reoperation rates warrant caution in long-term mechanical valve management; leaves open prospective validation of risk factors.
G Rizzoli (1999) conducted a cohort in Mechanical valvular prostheses (n=2,680). Mechanical valvular prostheses was evaluated on Reoperation for pannus and valvular thrombosis. Mechanical valves have a low incidence of reoperation for pannus (0.24%/patient-year) and thrombosis (0.15%/patient-year), with bileaflet prostheses showing an 83% risk reduction for thrombosis.
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