sensor sensor optimization for internal use only normal chronotropic response 60 70 80 90 100 110...
TRANSCRIPT
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SensorSensor Optimization
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Normal chronotropic response
60
70
80
90100110
120130
140
150Rate min-1
Time
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Chronotropic incompetence
60
70
80
90100110
120130
140
150
Rate min-1
Time
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Chronotropic incompetence
60
70
80
90100110
120130
140
150
Rate min-1
Time
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Chronotropic incompetence
60
70
80
90100110
120130
140
150
Rate min-1
Time
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Omnisense Accelerometer
In the following products:
Trilogy DR+AffinityEntity
IntegrityIdentity
ADx-family
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50 60 70 80 90
Paced Rate (min-1)
Sitting
Standing
Casual Walk
Brisk Walk
Up Stairs
Down Stairs
Omnisense Accelerometer
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First Clinical Experience with a new accelerometer-based Sensor during different daily activities, Candinas R, Erne P, Schönbeck M, European Trilogy DR+ Investigators, EUR.J.C.P.E, 1996:6.177:A706 26/5
Sensor
Intrinsic
60
80
100
120
Sit
tin
g
Sta
nd
ing
Cas
ual
Wal
k
Bri
skW
alk
Up
Sta
irs
Dow
nS
tair
s
Paced Rate (bpm)
Omnisense (literature)
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Sensor Pacemakers
•Maximum Rate
• (Minimum Rate = Basic Rate)
•Threshold
•Slope (Rate responsive factor)
•Reaction time
•Recovery time
Parameters
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Sensor Parameters
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Sensor Parameters
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Sensor Parameters
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Activity Level and Sensor Signal
Z Z Z Z
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Mean Value
Max Rate
Min Rate
Rate
Activity
Z Z Z Z
Threshold
AUTO -0.5
Sensor Threshold
60
70
80
90
100
110
120
50
40
Too low threshold:
Sensor driven rate at rest!Too high threshold:
Basic rate at low level exercise!
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Max Rate
Min Rate
Rate
Activity
Z Z Z Z
Sensor Slope
60
70
80
90
100
110
120
50
40
Slope 8
Slope 8:This activity level gives a rate increase of 25 min-1
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Max Rate
Min Rate
Rate
Activity
Z Z Z Z
Sensor Slope
60
70
80
90
100
110
120
50
40
Slop
e 12
Slope 12:The same activity level givesa rate increase of 40 min-1
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Max Rate
Min Rate
Rate
Activity
Z Z Z Z
Sensor Slope, Basic Rate and Max. Sensor Rate
60
70
80
90
100
110
120
50
40
Slope 6
A low slope, a low basic rate or a high max. sensor rate may exclude ability to reach max. sensor rate.
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Slope and Target Rate
Target Rate, slope 8
Target Rate, slope 12
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Reaction- & Recovery Time
Reaction Time Recovery Time
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0 128
80
90
100
110
120
130
140
70
60
Rate
Sensor Slopes
Max. Sensor Rate
Threshold
1
2
3
4
5
6
7
8910
111213141516
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Diagnostics
3994
6
6% 1%29%<1%62%
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Heart Rate Histogram
Histogram shows ventricular rate,
preceded by AP or AS (or a PVC)
…And for total time sampled
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Chronotropic Incompetence
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Is Sensor On or Passive?
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Mix of Sensor Drive & Intrinsic rate
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Intrinsic Rate Overdriving the Sensor
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Is Sensor Performing Well?
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Sensor On or Passive?
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Rate Response Optimization
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