Table 1.
Baseline characteristics of the study population (n=94) by recurrence status
| Variables | No Recurrence (n=68) | Recurrence (n=26) | Total (n=94) | p valuea |
|---|---|---|---|---|
| Summary of continuous variable: mean (SD) | ||||
| Difference between EAM ablated area and LGE-MRI scar area | 15.2 (9.1) | 21.3 (7.5) | 16.9 (9.0) | 0.003 |
| Age (years) | 66.4 (10.5) | 66.6 (9.1) | 66.5 (10.0) | 0.931 |
| Ablation time (s) | 2241.8 (634.5) | 2314.9 (703.1) | 2260.8 (649.1) | 0.667 |
| Left atrial surface area (cm2) | 143.1 (33.8) | 156.4 (38.6) | 146.8 (35.5) | 0.103 |
| Ablated area in EAM | 29.1 (7.5) | 33.5 (7.6) | 30.3 (7.7) | 0.013 |
| Scar percent in MRI | 14.3 (6.2) | 12.2 (4.1) | 13.7 (5.7) | 0.109 |
| Summary of categorical variable: N (%) | ||||
| Gender (male) | 49 (72.1) | 14 (53.9) | 63 (67.2) | 0.140 |
| Hypertension (yes) | 42 (61.8) | 14 (53.8) | 56 (59.6) | 0.492 |
| Diabetes (yes) | 10 (14.7) | 3 (11.5) | 13 (13.8) | 0.691 |
| Coronary artery disease (yes) | 17 (25.0) | 6 (23.0) | 23 (24.5) | 0.856 |
| Heart failure (yes) | 16 (23.5) | 5 (19.2) | 21 (22.3) | 0.654 |
| Number of PVs encircled (EAM) | 0.756 | |||
| 0 | 2 (2.9) | 0 (0.0) | 2 (2.1) | |
| 1 | 1 (1.5) | 1 (3.9) | 2 (2.1) | |
| 2 | 18 (26.5) | 5 (19.2) | 23 (24.5) | |
| 3 | 21 (30.9) | 8 (30.8) | 29 (30.9) | |
| 4 | 26 (38.2) | 12 (46.7) | 38 (40.4) | |
| Number of PVs encircled (MRI) | 0.822 | |||
| 0 | 14 (20.6) | 7 (26.9) | 21 (22.3) | |
| 1 | 19 (27.9) | 8 (30.8) | 27 (28.7) | |
| 2 | 15 (22.1) | 6 (23.1) | 21 (22.3) | |
| 3 | 12 (17.7) | 2 (7.7) | 14 (14.9) | |
| 4 | 8 (11.8) | 3 (11.7) | 11 (11.7) | |
| AF type | ||||
| Paroxysmal | 34 (50.0) | 11 (42.3) | 45 (47.9) | 0.504 |
| Persistent | 34 (50.0) | 15 (57.7) | 49 (52.1) | |
a
p values for testing the difference between means of continuous variables among recurrence and non-recurrence patients (Student’s t tests) and testing whether categorical variables are independent of the recurrence status (chi-squared or Fisher’s exact test)
EAM electroanatomic map, LGE-MRI late-gadolinium enhancement magnetic resonance imaging, PV pulmonary vein