Early postoperative echocardiogram parameters, mean (SD)
| 19 mm | 21 mm | 23 mm | 25 mm | 27 mm | Total | |||||||
| On-X,n=2 | SJM, n=2 | On-X, n=3 | SJM, n=8 | On-X, n=6 | SJM, n=12 | On-X, n=15 | SJM, n=7 | On-X, n=7 | SJM, n=4 | On-X, n=33 | SJM, n=33 | |
| Peak gradient, mm Hg | 32.2 (7.4) | 34.5 (0.7) | 21.9 (6.6) | 27.5 (6.9) | 29.9 (6.9) | 24.9 (5.9) | 19.1 (4.9)* | 25.1 (6.4)* | 22.1 (6.4) | 21.0 (5.5) | 22.7 (7.2) | 25.7 (6.4) |
| Mean gradient, mm Hg | 18.5 (0.7) | 19.0 (1.4) | 11.6 (2.5) | 14.6 (4.4) | 16.2 (3.6) | 13.2 (3.7) | 10.7 (3.5) | 13.0 (4.5) | 12.1 (4.6) | 11.7 (1.3) | 12.6 (4.3) | 13.7 (3.9) |
| Effective orifice area, cm2 | † | † | 1.8 (0.2) | 1.6 (0.3) | 1.9 (0.4) | 1.9 (0.2) | 2.3 (0.6) | 2.3 (0.5) | 2.5 (0.5) | 2.3 (0.5) | 2.2 (0.6) | 1.9 (0.5) |
| Effective orifice area index, cm2 m−2 | † | † | 1.1 (0.2) | 0.85 (0.2) | 0.97 (0.2) | 0.98 (0.1) | 1.2 (0.4) | 0.96 (0.1) | 1.2 (0.3) | 1.0 (0.2) | 1.1 (0.3) | 0.97 (0.2) |
* p=0.04, Mann-Whitney U test comparing the peak gradient between the ONX and SJM patients with a 25 mm valve size.
†Data not available.
SJM, St Jude Medical.