Mean volume of other procedures (cases per centre per year)
| 1992 | 1993 | 1994 | 1995 | 1996 | |
|---|---|---|---|---|---|
| Directional atherectomy | 2.1 | 2.1 | 1.4 | 1.6 | 1.0 |
| Rotational atherectomy | 0.6 | 0.7 | 1.7 | 0.9 | 4.1 |
| Mitral valvuloplasty | 5.2 | 7.7 | 7.6 | 9.6 | 8.0 |
| Aortic valvuloplasty | 0.4 | 0.2 | 0.6 | 0.5 | 0.3 |
| Dilatation of aortic coarct or recoarctation | 0.4 | 0.4 | 0.2 | 0.3 | 0.5 |