Table 1.
Baseline Characteristics Depending on the PR Interval
| Q1 (<166 ms) (n=139) | Q2 (166 to 182 ms) (n=128) | Q3 (182 to 202 ms) (n=161) | Q4 (≥202 ms) (n=148) | P Value | |
|---|---|---|---|---|---|
| Male, n (%) | 104 (74.8) | 102 (79.7) | 118 (73.3) | 111 (75.0) | 0.640 |
| Age, years | 55.1±12.4 | 56.9±11.0 | 58.5±12.0 | 60.5±10.3 | 0.001* |
| Paroxysmal AF, n (%) | 107 (77.0) | 104 (81.3) | 106 (65.8) | 79 (53.4) | <0.001* |
| BMI, kg/m2 | 24.6±2.7 | 24.6±2.9 | 25.0±2.7 | 24.9±3.1 | 0.593 |
| CHADS2 score | 0.9±1.1 | 0.9±1.0 | 1.2±1.2 | 1.0±1.0 | 0.098 |
| Heart failure, n (%) | 15 (10.8) | 4 (3.1) | 18 (11.2) | 6 (4.1) | 0.048* |
| Hypertension, n (%) | 51 (36.7) | 63 (49.2) | 88 (54.7) | 74 (50.0) | 0.013* |
| Age >75 years, n (%) | 5 (3.6) | 6 (4.7) | 10 (6.2) | 7 (4.7) | 0.766 |
| Diabetes, n (%) | 15 (10.8) | 16 (12.5) | 28 (17.4) | 27 (18.2) | 0.204 |
| Stroke/TIA, n (%) | 22 (15.8) | 13 (10.2) | 24 (14.9) | 15 (10.1) | 0.330 |
| β‐blocker, n (%) | 48 (34.5) | 46 (35.9) | 50 (31.1) | 41 (27.7) | 0.458 |
| Procedure & follow‐up | |||||
| Ablation time, s | 4657.0±1596.0 | 4730.9±1473.1 | 4993.2±1477.1 | 5186.6±1766.6 | 0.019* |
| Procedure time, min | 182.9±53.9 | 181.4±44.7 | 186.5±39.9 | 196.2±51.3 | 0.042* |
| Early recurrence, n (%) | 33 (23.7) | 40 (31.2) | 37 (23.0) | 50 (33.8) | 0.107 |
| Clinical recurrence, n (%) | 20 (14.4) | 6 (4.7) | 21 (13.0) | 33 (22.3) | 0.003* |
| Follow‐up duration, month | 13.6±7.6 | 13.4±7.4 | 13.2±7.6 | 12.4±7.6 | 0.574 |
AF indicates atrial fibrillation; BMI, body mass index; TIA, transient ischemic attack.
*
P < 0.05.