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`Holter monitor (24h) Information | Mount Sinai - New York
`
`Masks are still required in health care facilities, according to New York State. Visitors must show
`proof of full vaccination or a negative PCR test. For more general info, visit our COVID-19 Hub
`(https://www.mountsinai.org/about/covid19).
`
`x
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`Holter monitor (24h)
`
`Ambulatory electrocardiography; Electrocardiography - ambulatory; Atrial fibrillation - Holter;
`Flutter - Holter; Tachycardia - Holter; Abnormal heart rhythm - Holter; Arrythmia - Holter;
`Syncope - Holter; Arrhythmia - Holter
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`A Holter monitor is a machine that continuously records the heart's rhythms. The
`monitor is worn for 24 to 48 hours during normal activity.
`
`During a heart Holter monitor study, the patient wears a monitor that records electrical activity of their
`heart (similarly to the recording of an electrocardiogram). This usually occurs for 24 hours, while at the
`same time the patient also records a diary of their activity. Health care providers then analyze the
`recording, tabulate a report of the heart's activity, and correlate irregular heart activity with the entries of
`the patient's diary.
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`How the Test is Performed
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`Electrodes (small conducting patches) are stuck onto your chest. These are
`Masks are still required in health care facilities, according to New York State. Visitors must show
`attached by wires to a small recording monitor. You carry the Holter monitor in a
`proof of full vaccination or a negative PCR test. For more general info, visit our COVID-19 Hub
`pocket or pouch worn around your neck or waist. The monitor runs on batteries.
`(https://www.mountsinai.org/about/covid19).
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`x
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`While you wear the monitor, it records your heart's electrical activity.
`
`Keep a diary of what activities you do while wearing the monitor, and how
`you feel.
`After 24 to 48 hours, you will return the monitor to your health care
`provider's office.
`The provider will look at the records and see if there have been any
`abnormal heart rhythms.
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`It is very important that you accurately record your symptoms and activities so
`the provider can match them with your Holter monitor findings.
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`Electrodes must be firmly attached to the chest so the machine gets an accurate
`recording of the heart's activity.
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`While wearing the device, avoid:
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`Electric blankets
`High-voltage areas
`Magnets
`Metal detectors
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`Continue your normal activities while wearing the monitor. You may be asked to
`exercise while being monitored if your symptoms have occurred in the past while
`you were exercising.
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`How to Prepare for the Test
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`You do not need to prepare for the test.
`
`Your provider will start the monitor. You'll be told how to replace the electrodes if
`they fall off or get loose.
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`Tell your provider if you are allergic to any tape or other adhesives. Make sure you
`shower or bathe before you start the test. You will not be able to do so while you
`are wearing a Holter monitor.
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`How the Test will Feel
`Masks are still required in health care facilities, according to New York State. Visitors must show
`proof of full vaccination or a negative PCR test. For more general info, visit our COVID-19 Hub
`This is a painless test. However, some people may need to have their chest
`(https://www.mountsinai.org/about/covid19).
`shaved so the electrodes can stick.
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`Holter monitor (24h) Information | Mount Sinai - New York
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`x
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`You must keep the monitor close to your body. This may make it hard for you to
`sleep.
`
`Occasionally there may be an uncomfortable skin reaction to the sticky
`electrodes. You should call the provider's office where it was placed to tell them
`about it.
`
`Why the Test is Performed
`
`Holter monitoring is used to determine how the heart responds to normal activity.
`The monitor may also be used:
`
`After a heart attack (/health-library/diseases-conditions/heart-attack)
`To diagnose heart rhythm problems that may be causing symptoms such as
`palpitations (/health-library/symptoms/heart-palpitations) or syncope
`(passing out/fainting (/health-library/symptoms/fainting))
`When starting a new heart medicine
`
`Heart rhythms which may be recorded include:
`
`Atrial fibrillation or flutter (/health-library/diseases-conditions/atrial-
`fibrillation-or-flutter)
`Multifocal atrial tachycardia (/health-library/diseases-conditions/multifocal-
`atrial-tachycardia)
`Paroxysmal supraventricular tachycardia (/health-library/diseases-
`conditions/paroxysmal-supraventricular-tachycardia-psvt)
`Slow heart rate (bradycardia)
`Ventricular tachycardia (/health-library/diseases-conditions/ventricular-
`tachycardia)
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`Normal Results
`
`Normal variations in heart rate occur with activities. A normal result is no
`significant changes in heart rhythms or pattern.
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`What Abnormal Results Mean
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`Abnormal results may include various arrhythmias (/health-library/diseases-
`Masks are still required in health care facilities, according to New York State. Visitors must show
`conditions/arrhythmias) such as those listed above. Some changes may mean
`proof of full vaccination or a negative PCR test. For more general info, visit our COVID-19 Hub
`that the heart is not getting enough oxygen.
`(https://www.mountsinai.org/about/covid19).
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`x
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`Risks
`
`Other than the uncommon skin reaction, there are no risks associated with the
`test. However, you should be sure not to let the monitor get wet.
`
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`References
`
`Find a Doctor
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`Request an Appointment
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`At Mount Sinai
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`Cardiovascular Care (/care/heart)
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`Find a Heart Location (/care/heart/locations)
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`Meet Our Team (/care/heart/team)
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`
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`Related Articles
`
` Heart attack (/health-library/diseases-conditions/heart-attack)
`
` Arrhythmias (/health-library/diseases-conditions/arrhythmias)
`
` Chest pain (/health-library/symptoms/chest-pain)
`
` Atrial fibrillation or flutter (/health-library/diseases-conditions/atrial-
`fibrillation-or-flutter)
`
` Multifocal atrial tachycardia (/health-library/diseases-
`conditions/multifocal-atrial-tachycardia)
`
`
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`Holter monitor (24h) Information | Mount Sinai - New York
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`Paroxysmal supraventricular tachycardia (PSVT) (/health-library/diseases-
`Masks are still required in health care facilities, according to New York State. Visitors must show
`conditions/paroxysmal-supraventricular-tachycardia-psvt)
`proof of full vaccination or a negative PCR test. For more general info, visit our COVID-19 Hub
` Heart palpitations (/health-library/symptoms/heart-palpitations)
`(https://www.mountsinai.org/about/covid19).
` Fainting (/health-library/symptoms/fainting)
`
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`Holter monitor (24h) Information | Mount Sinai - New York
`
`Masks are still required in health care facilities, according to New York State. Visitors must show
`proof of full vaccination or a negative PCR test. For more general info, visit our COVID-19 Hub
`©2022 Icahn School of Medicine at Mount Sinai
`(https://www.mountsinai.org/about/covid19).
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