What are the parts of a hospital heart rate monitor?

Telemetry: For inpatient ambulatory patients, electrodes are taped to the chest and a transmitter box is attached to the trunk area. The heart rhythm recording is then transmitted wirelessly to a monitor at the nurses station. Bedside monitors don't allow the patient to walk about the ward freely. Other set ups allow the patient's heart rhythm to be recorded in a gadget strapped to the body. Finger styles.