Table 2.
Atrial electrogram abnormalities observed in spontaneously beating Scn3b−/− hearts
| Electrogram features in Scn3b−/− hearts | |||||
|---|---|---|---|---|---|
| Scn3b−/− heart | Sex | Irregular atrial and ventricular deflections | Episodes of SR* | Sinus node exit block | Episodes of spontaneous AT† |
| 1 | Female | ✓ | ✓ | ||
| 2 | Female | ✓ | ✓ | ||
| 3 | Female | ✓ | Four | ✓ | Six |
| 4 | Male | ✓ | ✓ | ||
| 5 | Male | ✓ | |||
| 6 | Male | ✓ | ✓ | ||
| 7 | Female | ✓ | Two | ✓ | |
| 8 | Female | ✓ | Five | ✓ | |
| 9 | Female | ✓ | ✓ | ||
| 10 | Female | ✓ | |||
| 11 | Male | ✓ | ✓ | ||
| 12 | Male | ✓ | ✓ | Two | |
| 13 | Male | ✓ | ✓ | ||
| 14 | Female | ✓ | One | ✓ | |
| 15 | Female | ✓ | ✓ | ||
SR, sinus rhythm; AT, atrial tachycardia.
*
Total of 12 episodes with a mean duration of 237.3 ± 85.2 s (n = 4). All episodes were accompanied by a prolonged atrial-ventricular interval.
†
Total of eight episodes with a mean duration of 2.37 ± 0.7 ms (n = 2).