Final answer:
A Holter monitor is used to measure the electrical activity of the heart over 24 hours. It is a small, portable device that uses surface electrodes to record the complex signals produced by the heart.
Step-by-step explanation:
The purpose of wearing a Holter monitor is to measure the electrical activity of the heart over 24 hours. A Holter monitor is a small, portable device that continuously monitors the heart's electrical activity during a person's normal routine. It uses surface electrodes placed on the body to record the complex electrical signals produced by the heart.