Pooled incidence of valve related events and their outcomes after aortic valve replacement with a mechanical valve and a bioprosthesis
| Valve related events | Events (n) | LOR (per 100 patient-years) | Outcome, death rate | Reoperation rate | ||||
|---|---|---|---|---|---|---|---|---|
| Mech | Bio | Mech | Bio | Mech | Bio | Mech | Bio | |
| *A Gompertz model was constructed. | ||||||||
| †A two period exponential model was constructed for risk during and after the first six months after implantation. | ||||||||
| ‡A Weibull model was constructed incorporating age dependency. | ||||||||
| Bio, bioprosthesis; LOR, linearised occurrence rate (or hazard); Mech, mechanical valve; NSD, non-structural dysfunction; SVD, structural valvar deterioration. | ||||||||
| Valve thrombosis | 39 | 2 | 0.16 | 0.01 | 0.22 | 0.67 | 0.63 | 0.33 |
| Thromboembolism | 419 | 717 | 1.6 | 1.3 | 0.17 | 0.18 | 0 | 0.01 |
| Haemorrhage | 419 | 189 | 1.6* | 0.4 | 0.14 | 0.2 | 0 | 0 |
| Endocarditis | 89 | 240 | 3.9/0.66† | 3.2/0.48† | 0.43 | 0.36 | 0.53 | 0.5 |
| NSD | 70 | 91 | 0.29 | 0.3 | 0.04 | 0 | 0.37 | 0.43 |
| SVD | 0 | 469 | 0 | ‡ | 0 | 0.12 | 0 | 0.75 |