One possible diagnostic test for cardiac examination is a 24-hour ECG measurement, the Holter test. The reporting of the Holter device is identical to that of an ECG device used in the examination.
The Holter records electrical signals from the heart. A disposable self-adhesive electrode is attached to the appropriate places on the patient’s chest to which the leads are attached. The device should be worn in a portable case that can be hung around your neck or waist belt, and it should not be removed or exposed to water for 24 hours.