Patient Monitor User’s Manual
5-1
Chapter 5 Measuring ECG
5.1 Introduction
Before the mechanical contraction, the heart will firstly
produce electrization and biological current, which will be
conducted to body surface through tissue and humors; the current
will present difference in potential in different locations of the
body, forming potential difference ECG, also known as body
surface ECG or regular ECG, is obtained by recording this
changing potential difference to form a dynamic curve. Monitor
measures the changes in the body surface potentials caused by the
heart of the patient, observe the cardioelectric activities, record
the cardioelectric waveforms and calculate the HR through the
multiple electrodes connected to ECG cable.
5.2 Safety Information
Warning:
It is imperative to only use the ECG electrodes and
cables provided by manufacturer or specified in this
manual. Users shall use the electrode which has little
polarization voltage and little contact resistance.
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