Table 3.
Clinical and electrophysiological characteristics of patients with paroxysmal atrial fibrillation (AF) in the absence of structural heart disease who had recurrences versus those who had no AF recurrence after pulmonary vein isolation.
| Pts with recurrences n = 22 |
Pts without recurrence n = 23 |
p value | |
|---|---|---|---|
| Age (years) | 59.3 ± 10.4 | 58.3 ± 9.8 | 0.78 |
| Left atrial diameter (cm) | 39.5 ± 4.6 | 38.4 ± 4.1 | 0.56 |
| Left atrial surface (cm2) | 20.6 ± 3.0 | 19.4 ± 2.6 | 0.15 |
| Left ventricular ejection fraction (%) | 66.5 ± 4.0 | 67.7 ± 3.3 | 0.24 |
| P wave duration (ms) | 141.9 ± 21.3 | 138.7 ± 17.4 | 0.57 |
| RMS 20 (μV) | 4.36 ± 2.96 | 3.56 ± 2.29 | 0.31 |
| RMS 30 (μV) | 4.59 ± 2.64 | 4.78 ± 2.95 | 0.82 |
| RMS 40 (μV) | 5.18 ± 2.32 | 5.30 ± 3.15 | 0.88 |
| P wave integral (μVs) | 663 ± 262 | 630 ± 262 | 0.66 |
| HRA-HBE (ms) | 37.0 ± 8.2 | 43.1 ± 13.0 | 0.06 |
| HRA-pCS during sinus rhythm (ms) | 61.1 ± 15.9 | 66.7 ± 18.7 | 0.29 |
| HRA-pCS during pacing 600 ms (ms) | 91.0 ± 20.9 | 86.9 ± 16.9 | 0.47 |
| HRA-dCS during sinus rhythm (ms) | 86.9 ± 24.0 | 88.8 ± 20.4 | 0.77 |
| HRA-dCS during pacing 600 ms (ms) | 119.3 ± 25.2 | 117.5 ± 19.4 | 0.78 |
| Right atrial ERP (ms) | 263.9 ± 44.5 | 266.1 ± 43.9 | 0.86 |
| Left atrial ERP (ms) | 268.2 ± 32.2 | 275.2 ± 20.9 | 0.38 |
dCS = distal coronary sinus; ERP = effective refractory period; HBE = atrial electrogram on the His bundle electrode; HRA = high right atrium; pCS = proximal coronary sinus; ms = milliseconds; RMS = root mean square; μV = microvolt.