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Chapter 5: ECG Monitoring
5.1 GENERAL
Monitoring the ECG produces a continuous waveform of the patient's cardiac electric activity for
an accurate assessment of his current physiological state. The process of depolarization and
repolarization of the myocardium generates electric potential that are sensed by ECG electrodes
on the skin. These electrodes are typically attached to the patient's right arm, left arm and left leg.
The monitor processes and amplifies these signals and presents the ECG waveform on the
screen. Only proper connection of the ECG cables can ensure satisfactory measurement.
Normal QRS complex involves:
■ Tall R-wave completely above or below the baseline
■ T-wave less than one-third of the R-wave height.
■ P-wave much smaller than the T -wave.
Warning
This device is defibrillator proof, and this feature requires use of manufacture specified
accessory including electrodes, lead wires, and patient cable.
Warning
Do not touch the patient, bed, table or the monitor during defibrillation.
Standard ECG waveform
5-2
User Manual
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