Medtronic PROTECTA XT DR D314DRG, Clinician Manual

Page: 371 / 508

Figure 190. Example of Burst pacing operation
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V-V interval
ECG
Marker Channel
V-V interval
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1 The device detects a VT episode.
2 The first Burst sequence is delivered with a pacing interval of 290 ms, but this sequence fails to
terminate the VT episode.
3 The device redetects the VT episode.
4 The second Burst sequence is delivered with a pacing interval of 280 ms (the interval decrement
being 10 ms per sequence). This sequence terminates the VT episode.
9.2.2.3 Ramp pacing therapy
The programmable parameter Initial # Pulses sets the number of pulses in the first Ramp
sequence. Ramp pacing intervals are controlled by the programmable parameters R-S1
Interval=(%RR) and Interval Dec.
In each Ramp sequence, the first pulse is delivered at a pacing interval determined by the
R-S1 Interval=(%RR) parameter, as a percentage of the ventricular tachycardia cycle
length. The remaining pulses in this sequence are delivered at progressively shorter pacing
intervals by subtracting the Interval Dec value for each pulse.
Medtronic PROTECTA™ XT DR D314DRG
Clinician Manual 371