Medtronic PROTECTA XT DR D314DRG, Clinician Manual

Page: 402 / 508

3 The device redetects the AT/AF episode.
4 The second Ramp sequence is delivered with 7 pulses. The first interval is 260 ms, and each
interval that follows is decremented 10 ms, the Interval Decrement value. This sequence
terminates the AT/AF episode.
9.5.2.5 Operation of 50 Hz Burst pacing
The device delivers a 50 Hz Burst therapy sequence with a burst of pulses at 20 ms pacing
intervals for the programmed 50 Hz Burst Duration. Each time the atrial tachyarrhythmia is
redetected, the device delivers another identical 50 Hz Burst sequence until delivering the
last programmed sequence. Atrial therapy scheduling is delayed for 16 ventricular events
after each 50 Hz Burst therapy sequence.
VOO ventricular backup pacing is available during 50 Hz Burst therapy.
Figure 208. Example of 50 Hz Burst pacing operation
200 ms
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
1
0
0
8
1
0
8
1
0
1250 8
3
0
8
2
0
8
1
0
2
1
0
2
6
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
T
Dl
T
Dl
T
Dl
T
Dl
T
Dl
T
Dl
A
S
T
P
T
S
T
S
T
S
T
S
T
S
T
S
T
S
T
S
T
S
T
S
T
Dl
V
S
V
S
V
S
V
S
V
S
V
S
V
S
A-EGM
Marker Channel
A-A interval
V-V interval
V-EGM
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
2
7
0
1
0
0
8
1
0
8
1
0
8
1
0
8
1
0
8
0
0
1130 1250
8
7
0
8
5
0
T
Dl
T
Dl
T
Dl
T
Dl
T
Dl
T
Dl
T
Dl
T
Dl
T
Dl
T
Dl
T
Dl
T
Dl
A
S
A
S
A
S
V
S
V
S
V
S
V
P
V
S
A-EGM
Marker Channel
A-A interval
V-V interval
V-EGM
1 The device detects an AT/AF episode.
Medtronic PROTECTA™ XT DR D314DRG
402 Clinician Manual