Saint Jude Medical Algorithm

The QuickOpt™ algorithm optimizes the paced and sensed AV delay, and the VV delay based on the P-wave duration, measured from the atrial EGM (AV delays) and on the measurement of the VV delays during spontaneous rhythm, RV stimulation and LV stimulation (VV delay).

Four measurements are made automatically:

  • P-wave duration
  • VV delay during spontaneous rhythm
  • VV delay during RV stimulation
  • VV delay during LV stimulation

Optimization of the AV delay

The optimal post sensed AV delay corresponds to the P-wave duration + 30 ms if the P-wave duration is >100 ms, and to the P-wave duration + 60 ms if the P-wave duration is <100 ms. The post stimulation AV delay = the post sensed AV delay + 50 ms.


Optimization of the VV delay

The optimal VV delay is calculated from the formula: ΔV spontaneous + (tLR – tRL) ) / 2

Where spontaneous ΔV = the delay between right and left activation during spontaneous rhythm; tLR  = VV interval during LV stimulation; tRL : interval between RV and LV during RV stimulation

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