Abbott - AV and VV delay optimization
Content
QuickOpt algorithm
The QuickOpt™ algorithm optimizes stimulated AV delay, detected AV delay, and interventricular (VV) delay based on the measurement of P wave width, estimated from the atrial EGM (AV delays), and on the measurement of interventricular delays measured in spontaneous rhythm, right ventricular pacing, and left ventricular pacing (VV delay).
Four tests are performed automatically:
- estimation of P wave width
- measurement of the delay between right and left ventricular activation in spontaneous rhythm
- measurement of RV-LV conduction time (RV pacing)
- measurement of LV-RV conduction time (LV pacing)
The optimal post-detection AV delay corresponds to the P wave width + 30 ms if the P wave width > 100 ms and to the P wave width + 60 ms if the P wave width < 100 ms.
The post-pacing AV delay is equal to the post-detection AV delay + 50 ms.
Measurement of the P-wave width
The optimal VV delay is determined using the formula: Spontaneous ΔV + (tGD – tDG) ) / 2
Spontaneous ΔV: delay between right and left activation in spontaneous rhythm;
tGD: time between LV and RV during left ventricular stimulation;
tDG: time between RV and LV during right ventricular pacing
Following the completion of these four tests, an optimal program is proposed.
