Table 1.
Incidence of AT/F induced by PES or burst pacing and maximum duration of induced AT/F with either PES or burst pacing induction.
| Wild type | RGS2−/− | |
|---|---|---|
| INDUCIBILITY | ||
| PES | 4% (1/25) | 50% (11/22) |
| Burst (50 Hz, 400 ms pulse) | 40% (10/25) | 64% (14/22) |
| DURATION | ||
| No response | 60% (15/25) | 36% (8/22) |
| <10 s | 20% (5/25) | 23% (5/22) |
| 10–30 s | 16% (4/25) | 18% (4/22) |
| >30 s | 4% (1/25) | 23% (5/22) |
X2 analysis of discrete values revealed significant differences in atrial tachycardia/fibrillation (AT/F) susceptibility with programmed electrical stimulation (PES; P < 0.05).