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12 Lead ECG Amp and Analysis
Module
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12 Lead ECG Amplifier Model
This ECG Amplifier has been designed to meet the
demanding requirements of the medical research community. The amplifier
accurately conditions up to twelve simultaneous surface ECG leads.
The leads are: I, II, III, aVR, aVF, aVL (derived from
Einthoven's Triangle) and six V leads (referenced to Wilson's central
terminal). The RL (Right Leg) is driven by a signal derived from either
Wilson's central terminal or Iso-common. Patient (subject) connections are
accomplished via an industry standard ten-lead ECG cable. Analog outputs
are ± 5.0 Volts Full Scale, available from twelve front panel mounted BNC
connectors.
This product is not a "medical
device" and it is not intended to be used for the purposes of
diagnosis of disease or other conditions, or in the cure, mitigation,
treatment or prevention of disease, or used as a life support device.
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Standard
ECG-100W Analysis Module for PoNeMah P3Plus System.
The purpose of the ECG algorithm is to compute derived
parameters from valid ECG complexes and to detect the presence of arrhythmia.
This Analysis module can be used to analyse any leads recorded using the new 12 Lead ECG
amplifier. The derived parameters are listed below.
Derived
Parameters Using ECG-100W Analysis Module
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Cycle Number
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- The number of the cardiac cycle. This
number will appear on a primary graph page when validation marks are turned on and the
cycle numbers are enabled.
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RR-Interval
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- The RR-I Interval is the time period between
two consecutive R-waves in units of milliseconds.
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Instantaneous Heart Rate (HR)
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- Heart Rate, in beats-per-minute, is computed as the
reciprocal of the R-R Interval multiplied by 60.
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R-Height
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- The height of the R wave from the iso-electric level, in
mV.
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ST-Interval
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- Time interval in milliseconds from the S wave
to the end of the following T wave.
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Variable ST-Elevation
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- The ST-Elevation, measured "ST Measure" mSec
after the S wave, from the iso-electric level.
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QRS Width
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- Time interval of the QRS complex, from the Q wave to the
S wave measured in milliseconds.
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PR-Interval
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- The PR-Interval is measured as the time period from the
beginning of the P wave to the beginning of the Q wave. This is expressed in units of
milliseconds.
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P-Height
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- The height of the R wave from the iso-electric level, in
mV.
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T-Height
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- Highest point between the end of the S wave and the end
of the T wave relative to the iso-electric point.
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| T-Height Negative
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Lowest point between the end of the S wave
and the end of the T wave relative to the iso-electric point. |
QT Interval
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- The QT-Interval is the time period between the beginning
of the Q wave to the end of the following T wave. This is expressed in units of
milliseconds.
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Q Alpha T
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The Q Alpha T is the time interval from
the Q wave to the peak of the following T wave. This is expressed in units of
milliseconds. |
| Corrected QT Interval
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- The Corrected QT-Interval is computed as the QT-Interval
divided by the square root of the RR-Interval.
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BAD Waves
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- This is the number of complexes that were detected but
could not be fully analyzed. In other words, the complexes had missing P waves, T waves, a
negative R wave, or a wide QRS complex.
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Good Waves
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- This is the total number of good complexes
that were detected during the current logging period. In other words, all P waves and all
T waves were recognized for the complexes
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Total Waves
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- This is the total number of complexes that
occurred for a specified logging period, regardless of whether they were considered good
or bad by the algorithm. This number is not necessarily the sum of BAD plus GW, since the
GW counter does not count waves with missing T waves, but they are not labeled as BAD
either
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QR Interval
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- This is the time interval from the Q wave to the
following R wave.
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QR Amplitude
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QR amplitude is the lowest point on the Q
wave to the peak of the R wave. |
+dV/dT Max
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Maximum derivative of the R wave. |
T Area
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Area of the T wave in mV mSec. |
P Count
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The number of valid P waves encountered in
the logging period. |
T Count
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The number of valid T waves encountered in
the logging period. |
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MLE-100W Multi-Lead Electrocardiogram Analysis Module for PoNeMah P3Plus System.
This analysis module is designed to provide additional
derived parameters to those available with the ECG-100W analysis module. NOTE: This module can only be used on a P3 Plus system installed with the
ECG-100W Analysis module.
Addition Derived
Parameters Using MLE-100W Analysis Module (Can only be used in
conjunction with ECG-100W Analysis Module.)
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Extended QT (Single Lead)
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Extended QT in a single lead.
The longest QT interval in any of the recorded leads in a single group. |
EQTS Channel
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The channel from which the
longest QT interval was obtained, in the current group. This is the channel from
which the EQTS parameter was reported. |
Extended QT (Multi-Lead)
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Extended QT for
multileads. The QT interval measured from the first occurrence of the Q wave to the
last occurrence of the T wave across all recorded leads in a single group. |
| EQTM"Q"- Channel
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The channel from which the
first Q was found, in the current group. This is the Q used to report the EQTM
parameter. |
EQTM"T"- Channel
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The channel from which the
first T was found, in the current group. This is the T used to report the EQTM
parameter. |
| QT Dispersion
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QT Dispersion, which is the
longest QT interval measured in any recorded lead minus the shortest QT measure in any
recorded lead in a single group. |
| QTMc
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The channel from which the
shortest QT interval was found, in the current group. |
| QT Count
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The number of channels in a
group from which the EQTS, EQTM and QT Dispersion parameters are calculated. |
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Site by Rob Jones.
Copyright © 1999 Linton Instrumentation . All rights reserved.
Revised: April 18, 2008. |
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