Electrocardiogram Analysis Module

The Electrocardiogram (ECG) Analysis Module computes physiologically meaningful parameters on a beat-to-beat basis, from digitized multiple lead ECG data.  The analysis functions by applying a series of logical tests to the digitized ECG signal(s), utilizing criteria selected by the user.  The ECG signal can have positive, negative, or bi-phasic T waves, P waves, and QRS complexes.  The graph above represents a typical canine ECG recording and its first derivative as they would appear on the monitor.  Automated validation marks for Q, R, S, End of T and Beginning of P are shown (other validation marks are also available).  The validation marks provide visual, real-time verification of the accuracy of the system.  

Multi-Lead ECG parameters can also be calculated to provide additional information related to QT Interval prolongation and dispersion.

The list below describes the parameters calculated by the analysis module either in real-time or during subsequent analysis.

Model PNM-ECG100W

Name		Definition
Num		The number of the cardiac cycle.
HR		The heart rate is computed in beats-per-minute.
R-H, P-H, T-H		Height of the waves from the Iso-electric level, in millivolts.
T-HN		Lowest point between the end of the S wave and the end of the T.
ST-I		Time interval in milliseconds from the S wave to end of the following T wave.
ST-E		The ST elevation, measured in “ST Measure” milliseconds after the S wave, from the Iso-electric level.
QRS		Time interval of the QRS complex.
PR-I, QT-I, RR-I		Common Interval measurements.
QAT		Q Alpha T is the time interval from the Q wave to the peak of the following T wave.
QTcb, QTcf, QTcv, QTcm and QTck		Multiple corrected QT intervals (Bazett, Fridericia, Van de Water, Matsunaga and King).
EQTS, EQTSc, EQTM, EQTMcs, EQTMce, QTMc		Various cross channel calculations available with Multilead ECG Analysis.
QTD		QT Dispersion available with Multilead ECG Analysis.
QR-I, QRSA		QR interval, QR amplitude.
MxdV		Maximum derivative of the R wave.
T-A		Area of the T wave from the Iso-electric level.
PCt, TCt		The number of valid waves encountered in the logging period.
QTCt		QT count.
Count		Reports the number of ECG cycles in a given logging (averaging) period.
BAD		The number of arrhythmic beats detected during a specified logging period.
GW, TW		The Good Wave counts and number (Total Wave) of good and bad complexes.
QATN		Time, in milliseconds, between the Q wave and the lowest point between the end of S and the end of T wave.
PWdth		P Width reports the time, in milliseconds, between the start and end of the P wave.
Tpe-I		The time in milliseconds between the peak of the T wave and the end of the T wave.
T-P		The signal value at the peak of the T wave relative to the Iso-electric level.
Match, Pmatch, Qmatch, Smatch, Tmatch		Percent match values used specifically with ECG Pattern Recognition Option's (PRO) template analysis.
Noise		This parameter reports an approximation of the noise level in the ECG cycle.

Related Information

Greatly reduce processing time using ECG PRO's template-based analysis.

Click to learn more about
ECG PRO.