TABLE 1.
Patient Characteristics
| Entire Cohort (n = 116) |
Patients Undergoing Shock (n = 81)* |
||||||
|---|---|---|---|---|---|---|---|
| All Patients | Inducible by Burst Pacing or Shock | Non-Inducible by Burst or Shock | P-Value | Inducible by Shock | Non-Inducible by Shock | P-Value | |
| (n = 116) | (n = 35) | (n = 81) | (n = 16) | (n = 65) | |||
| Age (years) | 56 ± 12 | 57 ± 11 | 55 ± 12 | 0.529 | 54 ± 10 | 54 ± 12 | 0.800 |
| Male gender | 90 (78%) | 28 (80%) | 62 (77%) | 0.682 | 15 (94%) | 47 (72%) | 0.070 |
| Paroxysmal AF | 51 (44%) | 13 (37%) | 38 (47%) | 0.331 | 7 (44%) | 32 (49%) | 0.694 |
| Persistent AF | 40 (35%) | 10 (29%) | 30 (37%) | 0.379 | 4 (25%) | 21 (32%) | 0.570 |
| Permanent AF | 25 (22%) | 12 (34%) | 13 (16%) | 0.028 | 5 (31%) | 12 (18%) | 0.261 |
| Valvular heart disease | 22 (19%) | 10 (29%) | 12 (15%) | 0.083 | 4 (25%) | 11 (17%) | 0.362 |
| Mitral regurgitation | 70 (60%) | 22 (63%) | 48 (59%) | 0.716 | 4 (25%) | 6 (9%) | 0.519 |
| Left ventricular hypertrophy | 31 (27%) | 12 (34%) | 19 (23%) | 0.226 | 4 (25%) | 15 (23%) | 0.871 |
| Structural heart disease | 47 (41%) | 17 (49%) | 30 (37%) | 0.254 | 8 (50%) | 30 (46%) | 0.338 |
| Ejection fraction | 0.56 ± 0.07 | 0.55 ± 0.09 | 0.56 ± 0.05 | 0.282 | 0.56 ± 0.11 | 0.58 ± 0.06 | 0.099 |
| LA diameter (cm) | 4.2 ± 0.8 | 4.4 ± 0.9 | 4.2 ± 0.8 | 0.092 | 4.5 ± 0.8 | 4.1 ± 0.7 | 0.080 |
| Prior AF ablation | 17 (15%) | 5 (14%) | 12 (15%) | 0.941 | 1 (6%) | 10 (15%) | 0.339 |
| Procedure duration (min) | 242 ± 60 | 240 ± 48 | 243 ± 65 | 0.836 | 234 ± 47 | 236 ± 61 | 0.918 |
| Ablation time (min) | 58 ± 19 | 67 ± 19 | 55 ± 18 | 0.002 | 62 ± 17 | 52 ± 17 | 0.067 |
*
Only patients that were noninducible by burst pacing underwent testing of inducibity by shock.