VIP algorithm

Tracing

N° 2

Manufacturer Abbott Device PM Field Pacing Modes

Patient

Graph and trace

Atrial and ventricular pacing (programmed paced-AV delay 250 ms)
VIP algorithm; prolongation of the AV delay by 150 ms (programmable) for 2 cycles
Absence of intrinsic ventricular activity and ventricular pacing at the end of the prolonged AV delay (400 ms)
Unsuccessful search and return to DDD mode pacing at the programmed AV delay

Comments

This tracing illustrates the features of the VIP algorithm and its operation in a patient with atrioventricular conduction disorder
3 parameters are programmable
The VIP™ Extension which corresponds to the extension of the AV delay applied to the programmed AV delay (paced or sensed) to search for intrinsic conduction; the total value of the AV delay cannot exceed 450 ms
The search interval corresponding to the time interval between each intrinsic conduction search which can be programmed to 30 seconds, 1, 3, 5, 10 or 30 minutes; increasing this value avoids iterative searches in a patient with permanent atrioventricular block; decreasing the value avoids unnecessary right ventricular pacing in a patient with short-term paroxysmal conduction disorder
The number of consecutive cycles the device extends the AV delay to search for the occurrence of intrinsic conduction is programmable to 1, 2 or 3 cycles
It is possible to view the atrioventricular conduction histogram in the pacemaker's memory
It is possible to program a specific remote monitoring alert when the percentage of ventricular pacing exceeds a programmable threshold