S10/S12/S10A/S12A Patient Monitor User’s Manual
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Framingham: QTc QT 154 1
8.9. Isoelectric Segments
Between the global onset and offset of the QRS-complex, signal parts with a duration
of more than 6 ms and amplitudes not exceeding 20V for at least three samples should
be defined as isoelectric segments – I-wave before the global QRS-ONSET and K-wave
after the global QRS-OFFSET.
Isoelectric parts (I-wave) after global QRS-ONSET or before global QRS-OFFSET
(K-wave) are excluded in the duration measurement of the respective adjacent waveform.
8.10. ECG Relearning
Changes in ECG templates may result in erroneous arrhythmia alarms or/and
inaccurate heart rates.
The monitor provides ECG relearning function. ECG relearning enables the monitor
to learn new ECG templates to correct arrhythmia alarms and heart rate values. After
ECG relearning is completed, the monitor stores the QRS wave form obtained by learning
as a template as the normal ECG wave form of the patient. During ECG monitoring, when
you suspect abnormal arrhythmia alarm, you may need to start an ECG relearning.
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