Table 1.
Pulmonary vein measurements before and after ablation
| Measurement | Pulmonary vein | ||||
| All (n = 86) | Lower left (n = 17) | Right lower (n = 23) | Left upper (n = 223) | Right upper (n = 23) | |
| Maximum diameter (mm) | |||||
| Before | 20.8 (5.6) | 18.1 (2.2) | 20.0 (5.3) | 20.3 (6.6) | 24.3 (5.0) |
| After | 19.2 (5.2) | 16.1 (3.2) | 19.0 (4.0) | 18.5 (6.4) | 22.5 (4.4) |
| Difference* | 1.6 (1.1 to 2.2) | 2.0 (0.5 to 3.5) | 1.0 (−0.1 to 2.1) | 1.8 (0.7 to 2.9) | 1.8 (0.6 to 3.1) |
| p Value | <0.001 | 0.011 | 0.071 | 0.002 | 0.006 |
| Perimeter (mm) | |||||
| Before | 57 (14) | 47 (6) | 57 (14) | 55 (15) | 66 (12) |
| After | 52 (13) | 41 (8) | 54 (10) | 48 (15) | 61 (10) |
| Difference* | 5.2 (3.7 to 6.6) | 6.0 (2.8 to 9.2) | 2.6 (−0.5 to 5.6) | 7.3 (5.0 to 9.6) | 5.1 (1.9 to 8.3) |
| p Value | <0.001 | 0.001 | 0.093 | <0.001 | 0.003 |
| Cross sectional area (mm2) | |||||
| Before | 236 (118) | 154 (48) | 236 (99) | 213 (107) | 320 (131) |
| After | 186 (91) | 118 (43) | 213 (69) | 162 (95) | 257 (85) |
| Difference* | 43 (29 to 58) | 36 (17 to 55) | 23 (3 to 42) | 51 (35 to 67) | 62 (16 to 108) |
| p Value | <0.001 | <0.001 | 0.027 | <0.001 | 0.011 |
*Mean difference (95% confidence interval).