Chapter 8 Monitoring Parameter; Ecg Monitoring; How To Obtain High Quality Ecg And Accurate Heart Rate Value; Factors Affecting Ecg Signal - Gima VITAL PRO-SNET Manual Del Usuario

8.1 ECG Monitoring

8.1.1 How to Obtain High Quality ECG and Accurate Heart Rate Value

The electrocardiogram (ECG or EKG) is primarily a tool for evaluating the electrical events within the heart. The action
potentials of cardiac-muscle cells can be viewed as batteries that cause charge to move throughout the body fluids. These
currents represent the sum of the action potentials occurring simultaneously in many individual cells and can be detected
by recording electrodes at the surface of the skin. The figure below shows the system of the heart.
Right Atrium
Sinoatrial Node
(SAN)
Atrioventricular Node
(AVN)
Right Bundle Branch
(RBB)
Right Ventricle
First of all, the hospital should be equipped with a 100~240V power supply system with a typical grounding wire. If big
interference in ECG continues, connect one end of the grounding wire provided with this equipment to the grounding
wire on the back panel of this monitor, and the other end to the special grounding wire, water pipe or radiator.
A common ECG plate electrode used together with this monitor has short shelf life. Generally, the shelf life is only one
month after the package is opened. When outdated plate electrode is used, due to skin's contact impedance and big
electrode potential, the chance of interference will be increased, and the ECG baseline will have an unstable inclination.
Therefore, always use valid plate electrodes.

8.1.2 Factors affecting ECG signal

² Interference from Electrosurgical Unit;
² Doesn't filter the interference waveform;
² Poor grounding;
²
Electrodes are not placed properly;
² Use expired electrode or use disposable electrode repeatedly;

Chapter 8 Monitoring Parameter

HIS Bundle
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Left Atrium
Left Bundle Branch
(LBF)
Left Posterior Fascicle
(LPS)
Left Ventricle
Left Anterior Fascicle
(LAF)
Purkinje Fibers
(PF)