Comparison of global atrial conduction characteristics between 25 patients with isthmus dependent atrial flutter (group A) and 21 patients without (group B)
| Global RA function | Group A | Group B | p Value | |
|---|---|---|---|---|
| Antegrade | ||||
| P wave duration (ms) | 119.3 (17.5) | 114.4 (11.7) | 0.25 | |
| P wave amplitude (mV) | 0.20 (0.06) | 0.18 (0.04) | 0.28 | |
| P-HBE (ms) | 34.1 (7.5) | 32.8 (10.5) | 0.20 | |
| P-CSO (ms) | 60.5 (17.2) | 54.6 (10.6) | 0.63 | |
| P-DCS (ms) | 81.0 (22.3) | 75.1 (13.3) | 0.29 | |
| Retrograde | ||||
| RA free wall conduction velocity (m/s) | ||||
| LLRA PCL | 500 ms | 0.98 (0.09) | 1.00 (0.13) | 0.07 |
| 400 ms | 0.97 (0.11) | 1.00 (0.10) | 0.66 | |
| 300 ms | 0.96 (0.12) | 0.98 (0.10) | 0.55 | |
| 250 ms | 0.95 (0.10) | 0.97 (0.10) | 0.51 | |
| 200 ms | 0.91 (0.11) | 0.94 (0.07) | 0.29 | |
| RA septum conduction velocity (m/s) | ||||
| CSO PCL | 500 ms | 0.91 (0.09) | 0.98 (0.15) | 0.054 |
| 400 ms | 0.90 (0.09) | 0.99 (0.16) | 0.020 | |
| 300 ms | 0.91 (0.10) | 0.97 (0.14) | 0.094 | |
| 250 ms | 0.90 (0.10) | 0.97 (0.12) | 0.034 | |
| 200 ms | 0.86 (0.09) | 0.96 (0.17) | 0.014 | |
Data are mean (SD).
anova comparisons of conduction velocities at various pacing cycle lengths in the right atrial (RA) free wall and the RA septum were non-significant in group A and group B patients.
CSO, coronary sinus ostium; DCS, distal coronary sinus; HBE, His bundle electrogram; LLRA, low lateral right atrium; PCL, pacing cycle length.