User Manual Part 2

5-24
PACING THERAPIES
SENSORS AND TRENDING
• Long Reaction Time: results in a slower increase in the pacing rate
• Nominal setting: shown to be appropriate for the majority of patients in a
previous Guidant study; therefore, it is recommended for use in monitoring
the rate response prior to programming changes
Reaction Slopes
MSR
LRL
01020304050
Seconds
Paced rate
S
h
o
r
t
N
o
m
i
n
a
l
L
o
n
g
Figure 5-7. Reaction Time and paced rate
Reaction Time
MSR
LRL
Rest Stage 1 RestStage 2
Time
Shorter
Longer
Paced rate
Shorter
Reaction Time
Longer
Reaction Time
Nominal
Reaction Time
Figure 5-8. Reaction Time in exercise test
Programming Reaction Time for Normal Settings also changes the
corresponding selection for Post-Therapy Settings.
Response Factor (Accelerometer)
Response Factor (accelerometer) determines the pacing rate that will occur
above the LRL at various levels of patient activity (Figure 5-9 on page 5-25).
• High Response Factor––results in less activity required for the pacing rate
to reach the MSR
- DRAFT -