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Back to Cardiovascular Procedures
Holter monitor
A Holter monitor (also called an ambulatory electrocardiography
device), named after its inventor, Dr. Norman Holter, is a portable
device for continuously monitoring the electrical activity of the
heart for 24 hours or more. Its extended recording period is useful
for observing occasional cardiac arrhythmias that would be otherwise
difficult to identify in a shorter period of time.
Configuration
Much like standard electrocardiography (EKG), the Holter monitor
records electrical signals from the heart via a series of electrodes
attached to the chest. The number and position of electrodes varies by
model, but most Holter monitors employ from three to six. These
electrodes are connected to a small piece of equipment that is
attached to the patient's belt, and is responsible for keeping a log
of the heart's electrical activity throughout the recording period.
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Event diary
In addition to receiving the device itself, most patients are also
asked to keep a diary of activities, symptoms, and times that an
arrhythmia occurs. This information is used by doctors and technicians
to rapidly pinpoint problem areas in the vast amount of data recorded
during the monitoring period.
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