Draft - 1 Aug 08
ST/AR ST Segment Algorithm
7-8
ST/AR Arrhythmia Monitoring
•
ST/AR Algorithm - ST Segment Monitoring
Application Note,
#452298192851
•
IntelliVue Information Center Instructions for Use
and
Online Help
The
Measurement
The ST measurement for each beat complex is the vertical
difference
between
two measurement points. The
isoelectric point
provides the baseline for the
measurement and the
ST point
provides the other measurement point. It is
positioned with reference to the J-point.
Algorithm
Processing
ST analysis analyzes ECG signals to classify the heart beats. Only beats
classified as normal or Supraventricular (atrially paced) are used to calculate ST
elevations and depressions.
The ST/AR ST algorithm processing includes special ST filtering, beat selection
and statistical analysis, calculation of ST segment elevations and depressions,
and lead reconstruction and wave generation.
When ST analysis is being performed on two leads, the averaged derived and
reconstructed ST waves and associated ST segment values are given for up to
six leads, depending on the type of patient cable:
•
3-wire: one lead
R-WAVE PEAK
AT 0 MSEC
J POINT
ISO ELECTRIC
POINT
DEFAULT =
-80 MSEC
MEASUREMENT
POINT
DEFAULT =
J+60 MSEC
DIFFERENCE =
ST VALUE
P
Q
S
ST
T
Summary of Contents for IntelliVue TRx
Page 6: ...Draft 1 Aug 08 About this Book vi ...
Page 40: ...Draft 1 Aug 08 Accessories 2 18 Product Safety ...
Page 54: ...Draft 1 Aug 08 Audible Tones 3 14 Transceiver Controls ...
Page 74: ...Draft 1 Aug 08 Battery Information 4 20 Basic Operation ...
Page 94: ...Draft 1 Aug 08 Technical Alarms INOPs 5 20 Alarms ...
Page 152: ...Draft 1 Aug 08 How the QT Analysis Algorithm Works 7 24 ST AR Arrhythmia Monitoring ...
Page 176: ...Draft 1 Aug 08 Optimizing SpO2 Measurement Performance 8 24 SpO2 Monitoring ...
Page 236: ...Draft 1 Aug 08 Troubleshooting 11 16 Maintenance Cleaning Troubleshooting ...
Page 268: ...Draft 1 Aug 08 SpO2 Accessories A 10 Accessories ...
Page 270: ...Draft 1 Aug 08 B 2 Sales and Support Offices ...
Page 274: ...Draft 1 Aug 08 Index 4 ...