How electrode placement affects ECGs
By Kenneth Navarro
"The electrocardiogram (ECG) allows medical personnel to both monitor the electrical signals produced by the heart and interpret their meaning. The quality and accuracy of the prehospital ECG are directly related to the quality and condition of the electrodes.
At the beginning of the shift, paramedics must insure that electrode packages have current expiration dates. Expired electrodes may have dried or faulty conduction gel which will adversely affect the quality of the ECG tracing.