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Experience of the surgeons at end of 2004
| Surgeons | Years in Cardiac Surgery | Major cardiac surgery performed [N] | Valve implantation performed [N] | Freestyle valve implantation performed [N] | Mean transprosthetic gradients in subcoronary technique (ANOVA, p < 0.001) |
| F | > 20 | > 5000 | > 1000 | 26 | 14 |
| E | > 10 | 2500 | 400 | 66 | 17 |
| C | > 20 | > 4000 | > 1000 | 280 | 18 |
| A | > 10 | 2000 | 400 | 53 | 22 |
| B | > 15 | 2500 | 500 | 74 | 22 |
| D | > 10 | 1000 | 250 | 41 | 24 |
