Table 1.
Programming of CRT-D devices
| Parameter | CRT-D setting |
|---|---|
| Pacing mode | DDD |
| Lower rate limit | 70 bpm |
| Hysteresis | Off |
| Upper rate | Nominal 130 bpm |
| AV delay | Dynamic 120–180 ms |
| Ventricular pacing | BiV |
| RA, RV sense polarity | bipolar |
| LV pace polarity | bipolar LV tip -> LV ring |
| Rate smoothing | Off |
| VT zone | 160 bpm |
| First VT therapy | Burst: 8 pulses at 81 % Scan: 8 pulses with 10 ms decr. |
| Second VT therapy | 26 J |
| Third-last VT therapy | Maximum energy 41 J |
| VF zone | 200 bpm |
| First VF therapy | 26 J |
| Second-last VF therapy | Maximum energy 41 J |