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2020年4月20日—Whatis5-LeadECG?·3-leadmonitoring,whichuses3electrodesonthetorso;·5-leadmonitoring,whichuses5electrodesonthetorso;and·12- ...

In order to accurately and correctly assess a patient using 5-lead monitoring, it is necessary to understand how ECG works, know how to prepare the patient and be able to follow the standardised system for electrodes and their placements.

An electrocardiogram (ECG) is a non-invasive method of monitoring the electrophysiology of the heart (Mayo Clinic 2022).

An ECG machine records changes in electrical activity by drawing on moving paper known as an electrocardiograph. The paper moves at a speed of 25 mm per second, and the ECG machine plots time on the x-axis and voltage on the y-axis. On the electrocardiograph, one second is represented by five large squares. These large squares are broken into five smaller squares representing 0.04 seconds each. When the ECG machine is plotting the patient’s electrical activity, an increase of one mVolt in voltage moves the stylus by 1 cm (Sattar & Chhabra 2023).

While ECG is common...