- the VIP® algorithm programmable in Abbott™ devices corresponds to an AV delay hysteresis
- the AV delay is prolonged over a limited number of intervals to promote the return of intrinsic conduction
- at the end of the prolonged AV period, if no ventricular event has occurred, ventricular pacing is delivered
- there can be no blocked P wave during this search, given that ventricular pacing always occurs at the end of the prolonged AV delay in the absence of ventricular sensing
- the main advantage of this algorithm is therefore to permanently maintain a 1:1 activation ratio between atria and ventricles
- there is an increased risk of pacemaker mediated tachycardia
- 3 parameters are programmable
- the VIP® Extension corresponds to the extension of the AV delay applied to the programmed AV delay; the total value of the AV delay cannot exceed 450 ms
- the search interval corresponds to the time interval between each intrinsic conduction search (programmable from 30 seconds to 30 minutes)
- the number of consecutive cycles the device extends the AV delay to search for the occurrence of intrinsic conduction (programmable to 1, 2 or 3 cycles)
10 things you need to know about VIP® (Abbott™)
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