Table 1.
Ablation volume and cooling volume (ml) depending on the vascular flow rate. The cooling volume was derived by subtracting the achieved ablation volume from an idealized ablation defined by the respective maximum radii of each ablation slice. The test series with perfusion were compared to the test series without perfusion (median (min/max); *p ≤ 0.008; (*)p = 0.008–0.05).
| 0 ml/min | 1 ml/min | 2 ml/min | 5 ml/min | 10 ml/min | 100 ml/min | 500 ml/min | |
|---|---|---|---|---|---|---|---|
| A–V distance: 2.5 mm | |||||||
| Ablation volume | 7.2 (6.2/8.6) | 7.4 (6.2/8.4) | 5.6(*) (4.7/7.0) | 6.2 (5.5/7.4) | 6.3 (5.3/6.5) | 5.8(*) (5.1/6.6) | 5.4* (5.2/6.1) |
| Cooling volume | 0.6 (0.4/1.0) | 0.8 (0.0/0.9) | 1.0 (0.7/1.4) | 1.0(*) (0.7/1.3) | 1.2* (0.9/1.8) | 1.6* (1.4/1.8) | 1.8* (1.4/1.9) |
| Cooling portion | 8% | 11% | 18% | 16% | 19% | 28% | 33% |
| A–V distance: 5.0 mm | |||||||
| Ablation volume | 6.7 (5.0/9.0) | 6.2 (4.4/8.8) | 6.9(*) (5.5/7.2) | 4.8 (4.3/6.1) | 4.6 (2.2/6.2) | 4.4 (3.9/7.0) | 5.2 (3.9/6.1) |
| Cooling volume | 0.6 (0.3/1.1) | 1.0 (0.8/1.2) | 1.4* (0.9/1.9) | 1.4* (1.1/1.7) | 1.4(*) (0.8/1.9) | 1.7* (1.7/2.6) | 1.7* (1.0/1.9) |
| Cooling portion | 9% | 16% | 20% | 29% | 30% | 39% | 33% |
| A–V distance: 10 mm | |||||||
| Ablation volume | 6.7 (4.7/8.7) | 7.1 (5.3/7.7) | 6.9 (5.4/7.7) | 6.1 (4.3/7.6) | 5.9 (4.0/7.6) | 6.1 (5.3/7.4) | 5.6 (3.7/5.9) |
| Cooling volume | 0.8 (0.5/1.1) | 1.0 (0.7/1.2) | 1.6* (0.9/1.8) | 1.1 (0.7/1.3) | 1.3* (0.8/1.7) | 1.3(*) (0.8/1.7) | 1.1(*) (0.9/1.4) |
| Cooling portion | 12% | 14% | 23% | 18% | 22% | 21% | 20% |