BURGER / PHANIE / SCIENCE PHOTO LIBRARY BURGER / PHANIE / SCIENCE PHOTO LIBRARY
Editorial use only.
Placing electrodes on the chest of a male patient, connected to a Holter monitor at her waist. A Holter monitor is a portable electrocardiograph (ECG) device. It can measure and record the electrical activity of a patient's heart over 24 hours, and detect cardiac arrhythmia.
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