Wearing a Holter monitor: How to use it for cardiovascular monitoring

According to statistics from cardiovascular organizations worldwide, millions of people are prescribed to wear a Holter ECG device each year to detect arrhythmias that traditional ECGs might miss. However, many people feel anxious and confused, not knowing what a Holter ECG machine is, how to wear it, how to go about their daily activities, and what factors might affect the test results.

If you have just been prescribed by a doctor to wear a 24-hour or 48-hour Holter ECG, understanding how to use the device correctly will help collect more accurate data, assisting your doctor in assessing your cardiovascular condition during daily activities. In this article, Tiptory will provide detailed instructions on how to wear a Holter ECG device, important notes on daily activities, and how to ensure the highest reliability of monitoring results.

Part 1: When to wear a Holter monitor and pre-examination notes

Step 1: Do you need to see a cardiologist?

Determine when to see a cardiologist

If you frequently experience symptoms such as palpitations, rapid heartbeat, irregular heartbeat, chest pain, shortness of breath, or unexplained dizziness, you should consider scheduling an appointment with a cardiologist. Early examination helps detect heart rhythm problems and assess whether tests such as an electrocardiogram (ECG), Holter ECG monitoring, or other specialized examinations are needed.

• Monitor any unusual symptoms related to your heart.
• Record the timing and severity of symptoms.
• Seek early examination if symptoms recur frequently or worsen.
• Undergo tests as indicated to determine the exact cause.

See a general practitioner if you don't have a cardiologist

If you don't currently have a cardiologist, you can visit a medical facility or a general practitioner first. After assessing your health condition, the doctor will advise on appropriate treatment and refer you to a cardiologist if necessary.

• Fully describe the symptoms you are experiencing.
• Provide information about your personal or family history of cardiovascular disease.
• Bring any previous test results if available.
• Follow referral instructions or appointments with a cardiologist.

Step 2: Schedule Holter ECG monitoring

Schedule an appointment with a cardiologist to be prescribed Holter ECG monitoring

To undergo Holter ECG monitoring, you need to be examined and prescribed by a cardiologist. After assessing your symptoms and health condition, the doctor will determine the necessary monitoring duration to accurately record your heart's activity during daily life.

• Holter ECG monitoring typically lasts from 24 to 48 hours.
• In some cases, longer monitoring may be required depending on the device type and examination purpose.
• The doctor will provide detailed instructions on how to use and when to remove the device.

Shower before starting monitoring

Most 24-hour Holter ECG devices need to be kept completely dry throughout use. Therefore, you should shower or clean yourself before your appointment, unless otherwise instructed by your doctor.

• Complete showering before the device is attached.
• Avoid letting the device or electrodes come into contact with water.
• Do not remove the device yourself during the monitoring period without your doctor's permission.

Understand how a Holter ECG works

A Holter monitor is a portable ECG device capable of continuously recording the heart's electrical signals for several hours or days. The collected data helps doctors detect abnormalities that might not appear during a single routine ECG at the hospital.

• Records heart rhythm continuously while working, resting, and sleeping.
• Monitors intermittent arrhythmia episodes.
• Supports assessing heart activity in real-life daily environments.

Cases where Holter ECG monitoring is often prescribed

Your doctor may recommend Holter ECG monitoring when there is a need to monitor symptoms or cardiovascular diseases with unclear causes.

• Suspected arrhythmia or irregular heartbeat.
• Frequent palpitations, pounding heart, or rapid heartbeat.
• Checking the effectiveness of ongoing cardiac medications.
• Assessing the heart's oxygen supply during daily activities.
• Monitoring symptoms such as dizziness, fainting, or shortness of breath related to cardiovascular issues.

Step 3: Receive and wear the Holter ECG device

Receive the Holter ECG device at the medical facility

At your scheduled appointment, you will receive the Holter ECG device to monitor your heart's activity for the specified duration. At many medical facilities, a technician will help attach the device and instruct you on how to use it before the monitoring process begins.

• Check the device before leaving the medical facility.
• Listen carefully to instructions on how to wear and care for the device.
• Ask the medical staff immediately if anything is unclear.

Attach electrodes correctly to the body

To record the heart's electrical signals, adhesive sensor pads called electrodes will be attached to the chest area and connected to the monitoring device.

• A technician usually assists with attaching electrodes for the first use.
• If instructed to attach them yourself, follow the specified positions correctly.
• Ensure the electrodes are firmly adhered to the skin to avoid interrupting data recording.

Inform if allergic to medical adhesive tape

Some people have sensitive skin or have experienced irritation from medical adhesives. Informing beforehand helps medical staff choose more suitable materials.

• Inform the technician if you have experienced redness or itching from medical adhesive tape.
• Monitor the skin area in contact with the electrodes during device wear.
• Contact the medical facility if severe irritation occurs.

Prepare the skin area for better electrode adhesion

In some cases, the technician may need to prepare the skin area before attaching electrodes to ensure accurate signal acquisition.

• Chest hair may need to be shaved in the area where electrodes are applied.
• Clean and dry the skin before attaching sensors.
• Avoid applying lotions or oils to the skin area where electrodes will be attached.

Wear the device in the most convenient way

Most 24-hour Holter ECG devices are designed to be compact so users can perform normal activities during monitoring.

• Place the device in a suitable pocket or pouch.
• Wear it on a shoulder strap or attach it to a belt as instructed.
• Some modern Holter models are designed as adhesive patches directly applied to the chest, making them more convenient for movement.

Ensure the device is always securely fixed

Keeping the device and electrodes stable throughout use helps ensure more accurate heart rhythm monitoring results.

• Avoid pulling on cables or applying strong force to the device.
• Periodically check if electrodes are peeling off.
• Perform daily activities naturally so that data accurately reflects your actual cardiovascular condition.

Part 2: Detailed instructions on how to correctly wear a Holter ECG

Step 1: Prepare your skin before wearing the Holter

Clean the skin area before attaching the device

For the Holter ECG device to record accurate signals, the skin area in contact with the electrodes must be thoroughly cleaned before starting monitoring. This helps the adhesive pads adhere more firmly and reduces the risk of electrodes detaching during use.

• Shower or wash your body with soap and clean water before wearing the device.
• Completely dry your chest area before attaching the electrodes.
• Do not apply lotion, oil, or any skincare products to the area where the sensors need to be attached.

Remove jewelry and upper body clothing

Before the technician attaches the electrodes or Holter patches, you need to prepare your chest area to be clear for easy installation.

• Remove your shirt and any items covering your chest area.
• Remove necklaces or any jewelry that might obstruct the device attachment.
• Maintain a comfortable posture to allow the technician to work easily.

Address chest hair if necessary

Thick chest hair can reduce electrode adhesion and affect the quality of the recorded ECG signal. Therefore, some areas on the chest may need to be prepared before attaching the sensors.

• Shave off hair in the electrode placement area as instructed by medical staff.
• Do not arbitrarily change electrode positions after they have been correctly attached.
• Ensure the skin surface is in direct contact with the sensor pads.

Use specialized cleaning wipes if provided

Some 24-hour Holter ECG kits come with antiseptic wipes or skin cleaning wipes to enhance electrode adhesion.

• Gently wipe the skin area where electrodes will be attached before placing the device.
• Wait for the skin to dry completely before attaching the sensors.
• Only use cleaning products recommended by the medical facility or manufacturer.

Proper preparation helps ensure more accurate monitoring results

Skin preparation, though simple, plays a crucial role in heart rate monitoring with a Holter ECG. Securely attached electrodes help the device continuously record the heart's electrical signals, assisting doctors in accurately assessing cardiovascular status and detecting signs of arrhythmia if present.

Step 2: Attach Holter electrodes in the correct position

Attach electrodes to the chest as instructed

For the Holter ECG device to accurately record the heart's electrical activity, the electrodes must be attached in the correct positions on the body as instructed by the doctor or technician.

• Attach electrodes to the chest area according to the provided diagram.
• Typically, electrodes will be placed in multiple positions around the heart to capture signals from different angles.
• Ensure the adhesive pads are in direct contact with the skin and remain firmly attached throughout the monitoring period.

Connect lead wires to the electrodes

After attaching the electrodes, lead wires will be connected to each sensor to transmit the ECG signals to the data recording device.

• Connect the lead wires to the corresponding electrodes.
• Many types of wires are designed with snap or clip connectors for quick and secure attachment.
• Double-check all connections before starting use.

Ensure lead wires are securely fixed

Loose or detached lead wires can interrupt continuous heart rate monitoring, affecting the quality of test results.

• Arrange wires neatly to avoid snagging when moving.
• Avoid pulling or twisting wires during daily activities.
• Check immediately if you feel an electrode or lead wire has come loose.

Follow medical staff instructions accurately

Each type of Holter ECG may have different installation and connection methods. Therefore, you should follow the provided instructions to ensure the device operates effectively.

• Do not arbitrarily change electrode positions after they have been attached.
• Do not remove lead wires or electrodes before the monitoring period ends.
• Contact the medical facility if you find an electrode has detached or the device is malfunctioning.

Correct electrode placement helps increase result accuracy

Proper electrode placement and secure connection to the device are crucial steps in wearing a 24-hour or 48-hour Holter ECG. Comprehensive data collection will help doctors accurately assess heart rhythm, detect signs of arrhythmia, rapid heartbeat, slow heartbeat, or other heart abnormalities that are difficult to identify with a standard ECG.

Step 3: Activate the Holter ECG device

Turn on the device as instructed

After attaching the electrodes and connecting the lead wires, you need to activate the Holter ECG device according to the instructions of your doctor or technician. Each device model may have different startup procedures, so following the correct process is very important to ensure complete data recording.

• Follow the instructions provided when you receive the device.
• Check if the device has been successfully activated.
• Do not arbitrarily change settings on the device without instructions from medical staff.

Check the device's operating signal

After turning on the device, confirm that the Holter ECG is functioning normally before leaving the medical facility or starting your daily activities.

• Observe the indicator light or display signal on the device.
• Ensure the light is blinking or displaying the correct status according to the user manual.
• Immediately report to medical staff if the device shows no signs of activity.

Let the device record data continuously throughout the monitoring period

One of the advantages of a 24-hour or 48-hour Holter ECG is its ability to continuously record heart activity while you go about your normal life. The device will automatically store data for the doctor to analyze after the monitoring period ends.

• Carry the device with you for the entire specified duration.
• Do not arbitrarily turn off or remove the device before the scheduled time.
• Maintain your usual daily activities so that the results accurately reflect your actual cardiovascular condition.

Monitor the device during use

Although most Holter ECG devices operate automatically, you should periodically check to ensure that the data recording process is not interrupted.

• Observe the activity indicator light if the device has this function.
• Check if the electrodes and lead wires are still securely attached.
• Contact the medical facility if the device reports an error or stops working abnormally.

The device will automatically end the data recording process

After completing the specified monitoring period, the device will usually automatically stop recording data or switch to standby mode, depending on the device type.

• Adhere to the wearing time prescribed by your doctor.
• Do not remove the device early unless instructed.
• Return the device to the medical facility at the scheduled appointment to download and analyze the ECG data.

Activating and using the Holter ECG device correctly helps collect accurate data, facilitating early detection of issues such as arrhythmia, rapid heartbeat, slow heartbeat, or other heart abnormalities that are difficult to identify with a standard ECG.

Step 4: Daily activities while wearing a Holter ECG

Maintain your daily activities

While wearing the Holter monitor, Tiptory should maintain daily activities as usual so the device can accurately record heart activity under real-world conditions. This helps the doctor fully assess heart rate changes during work, rest, or exercise.

• Go to work, study, and perform daily tasks as usual.
• Continue physical activities unless otherwise restricted by the doctor.
• Record any unusual symptoms that appear during monitoring.

Avoid sources of signal interference

Some electrical devices or strong magnetic fields can affect the Holter monitor's ability to record data.

• Limit exposure to magnets or strong magnetic field-generating devices.
• Avoid standing near high-voltage power lines or high-voltage areas.
• Inform medical staff if X-rays or related procedures are needed while wearing the device.
• Avoid passing through metal detector systems without specific instructions.

Maintain a safe distance from mobile phones

Mobile phones and some personal electronic devices can generate electromagnetic interference that affects the device's recording results.

• Keep the phone at least 15 cm away from the Holter monitor.
• Do not place the phone directly on the chest or close to the operating device.
• Avoid placing high-power electronic devices near the monitor.

Keep the device and electrodes dry

Water and moisture are common causes of electrode detachment or interruption of continuous heart monitoring.

• Do not shower, bathe, or swim while wearing the device.
• Avoid activities that cause excessive sweating if possible.
• Protect the device from rain and humid environments.
• You can clean your body with a wet towel or take a sponge bath as instructed by the medical facility.

Check electrodes regularly

The electrodes need to remain firmly attached for continuous and accurate ECG data recording.

• Periodically check if the patches are loose or detached.
• Avoid pulling the wires forcefully when changing clothes or moving.
• Contact the medical facility if an electrode comes off or the device stops working.

Choose a suitable sleeping position

Sleep is an important time to record heart activity when the body is at rest. A suitable sleeping position will help minimize impact on electrodes and wires.

• Lie on your back if comfortable.
• Avoid lying directly on the electrode placement area or the device.
• Adjust your position gently to prevent dislodging wires during sleep.

Normal daily activities lead to more accurate results

The goal of wearing a 24-hour or 48-hour Holter monitor is to record actual heart activity in daily life. Therefore, Tiptory does not need to change daily habits excessively, unless otherwise instructed by the doctor. The collected data will help detect issues such as arrhythmias, tachycardia, bradycardia, or infrequent cardiac abnormalities.

Step 5: Monitor Holter monitor battery

Ensure the device battery is always sufficiently charged

While wearing the Holter monitor, Tiptory needs to pay attention to the device's battery status to ensure uninterrupted data recording. Most Holter monitors today can operate continuously for several days without needing to be charged or have their batteries replaced.

• Many devices have battery life ranging from 80 to 100 hours or longer.
• Check the battery status according to the instructions of medical personnel.
• Do not let the device run out of battery during monitoring.

Replace battery correctly if required by the device

Some types of 24-hour or 48-hour Holter monitors use disposable batteries and may require battery replacement during use.

• Ask the technician thoroughly about battery replacement instructions before taking the device home.
• Prepare backup batteries if required.
• Follow the correct battery replacement procedure to avoid interrupting ECG data recording.
• Do not use battery types other than those recommended by the manufacturer.

Charge battery as instructed for rechargeable devices

Some modern Holter monitors are equipped with rechargeable batteries and come with specialized charging cables.

• Use the correct charger or cable provided.
• Follow the medical facility's instructions for charging.
• Avoid removing electrodes or turning off the device during charging unless instructed to do so.

Understand usage instructions before leaving the medical facility

Before starting the continuous heart monitoring process, Tiptory should take time to learn how to check the battery and handle power-related issues with the device.

• Inquire about the estimated battery life of the device.
• Learn how to recognize low battery warnings if the device has this feature.
• Save the contact number of the medical facility for assistance in case of problems.

Stable battery operation helps ensure accurate data

Maintaining continuous power for the Holter monitor is a crucial factor in ensuring the device fully records heart activity throughout the monitoring period. This allows the doctor to accurately assess signs of arrhythmias, tachycardia, bradycardia, or other cardiac abnormalities.

Step 6: Record symptoms while wearing the Holter

Monitor and record unusual symptoms

While wearing the Holter monitor, recording any symptoms that appear is very important. This information helps the doctor compare the time of symptom onset with the ECG data recorded by the device, thereby providing a more accurate assessment of the cardiovascular condition.

• Record immediately upon the appearance of unusual symptoms.
• Do not ignore signs, even if they are brief.
• Try to record as much detail as possible.

Clearly record the time and activity being performed

In addition to symptoms, Tiptory should record the time of occurrence and the activity being performed when symptoms appear. This helps determine whether heart rate abnormalities are related to exercise, rest, or other factors.

• Accurately record the date and time symptoms appeared.
• Describe the activity being performed, such as walking, working, climbing stairs, eating, or resting.
• Note the severity of symptoms if possible.

Symptoms requiring special attention

Some signs may be related to cardiovascular problems and should be fully recorded in the monitoring log.

Chest pain or tightness.

Rapid heartbeat or palpitations.

Feeling of irregular heartbeat.

Dizziness or lightheadedness.

Shortness of breath.

Unusual fatigue or near-fainting sensation.

Record daily activities

In addition to symptoms, an activity log also helps the doctor better understand how the heart responds in different daily situations.

• Record sleep and wake times.
• Note physical activities or strenuous exercise.
• Note times of work, rest, or stress.
• Monitor events that may affect heart rate.

Use the symptom marking function if the device supports it

Some modern Holter monitors are equipped with a device or button to mark events, allowing users to record the time of symptom onset directly on the monitoring system.

• Press the mark button when symptoms appear, as instructed by medical personnel.
• Continue to record details in the log to supplement information.
• Inform the doctor about the marked events when returning the device.

The monitoring log helps increase the value of Holter ECG results

Data from a 24-hour or 48-hour Holter monitor becomes more useful when combined with information about symptoms and actual activities. This helps the doctor easily detect signs of arrhythmias, assess the cause of palpitations, chest pain, or shortness of breath, and propose an appropriate treatment plan.

Part 3: How to remove the Holter monitor and return the device

Step 1: Remove the Holter monitor

Remove the device after completing the monitoring period

Upon completion of the Holter monitor wear period as prescribed by the doctor, Tiptory can proceed to remove the device according to the provided instructions. Correct removal helps avoid skin irritation and protects the device before returning it to the medical facility.

• Only remove the device when the prescribed monitoring period has ended.
• Perform gently to avoid skin damage.
• Double-check that all electrodes and wires have been completely removed.

Carefully remove electrodes from the skin

Electrodes are directly attached to the chest with medical adhesive, so they should be peeled off slowly to minimize discomfort.

• Peel each electrode gently along the edge of the patch.
• Avoid pulling hard to prevent skin redness or irritation.
• If it is difficult to remove, the adhesive can be softened as instructed by medical personnel.

Clean any remaining adhesive on the skin

After removing the electrodes, a small amount of adhesive may still remain on the skin. This is normal and can be easily managed.

• Wash the skin area with clean water and mild soap.
• Medical alcohol, mineral oil, or lotion can be used to clean any remaining adhesive.
• Clean and moisturize the skin area if dryness or mild irritation occurs.

Use support solution if provided

Some medical facilities may provide a specialized solution to help remove electrodes more easily.

• Use the correct solution as instructed.
• Apply to the adhesive contact area before peeling off the electrode if needed.
• Avoid contact of the solution with eyes or damaged skin.

Store the device before returning

After removal, the Holter monitor device should be stored carefully to prevent damage or loss of data.

• Place the device, wires, and accessories in the original storage box.
• Do not drop or impact the device.
• Check all accessories as required by the medical facility.

Prepare to hand over the device for results analysis

After completing the heart monitoring process with the Holter monitor, the data in the device will be downloaded and analyzed by a doctor or technician.

• Return the device to the medical facility on the scheduled date.
• Submit the activity and symptom log recorded during the monitoring period.
• Report any incidents that occurred while wearing the device, if any.

Proper removal and return of the Holter monitor ensures that data is fully preserved, helping the doctor accurately assess signs of arrhythmias, palpitations, irregular heartbeat, or other cardiac abnormalities.

Step 2: Return the Holter monitor

Return the device within the specified time

After completing the Holter monitor wear period, Tiptory must return the device according to the medical facility's appointment schedule. This is a specialized device temporarily provided for heart monitoring, so it must be returned in full after use.

• Check the device return time noted on the appointment slip or doctor's instructions.
• Do not keep the device beyond the required deadline.
• Store it carefully until handover.

Prepare all accessories before returning the device

Before returning, check all accompanying components to avoid loss or omission.

• Holter monitor.
• Connecting cables.
• Storage box or device protective bag.
• Other accessories provided when receiving the device.

Submit activity and symptom log

If required to keep a record during continuous ECG monitoring, Tiptory should submit this log along with the device. This is an important source of information that helps the doctor compare actual symptoms with the collected ECG data.

• Submit the logbook or provided form.
• Ensure that all information about time, activities, and symptoms has been fully recorded.
• Report any additional incidents that occurred while wearing the device, if any.

Follow the instructed return procedure

Depending on the regulations of each medical facility, the return of the Holter monitor can be done in various ways.

• Bring the device directly to the clinic or hospital.
• Send the device by mail if instructed.
• Follow the exact handover procedure previously communicated by the doctor or technician.

Wait for the doctor to analyze and provide results

After receiving the device, the professional team will download data from the device and proceed to analyze heart activity throughout the monitoring period.

• The doctor will assess any heart rhythm abnormalities, if present.
• The results help detect signs such as arrhythmias, tachycardia, bradycardia, or other cardiac problems.
• Re-examine on schedule for detailed consultation and explanation of results.

Returning the device fully aids in a smooth diagnostic process

Returning the Holter monitor on time, along with the monitoring log, will provide the doctor with sufficient data to accurately assess the cardiovascular condition. This is the final but very important step in the 24-hour or 48-hour Holter monitoring process, contributing to diagnosis and the development of an appropriate treatment plan.

Step 3: Receive Holter ECG results

Schedule a follow-up appointment after completing the test

After returning the Holter monitor, Tiptory should attend the follow-up appointment to receive results and have them explained in detail by the doctor. Typically, data analysis takes from a few days to about 1-2 weeks, depending on the procedures of each medical facility.

• Keep track of the appointment schedule provided by the doctor or hospital.
• Prepare questions related to symptoms or test results.
• Bring relevant documents and test results if requested.

The doctor will analyze data from the Holter monitor

Throughout the 24-hour or 48-hour Holter monitoring period, the device continuously recorded the heart's electrical activity. The cardiologist will review all this data to look for any abnormalities that may have occurred.

• Assess heart rate at rest, during exercise, and during sleep.
• Compare ECG data with the recorded activity log and symptoms.
• Identify any abnormalities that appear during monitoring.

Results can help detect arrhythmias

One of the important goals of Holter ECG is to detect heart rhythm abnormalities that may be missed by conventional ECGs.

• Atrial fibrillation.
• Bradycardia.
• Tachycardia.
• Ventricular premature beats.
• Other forms of arrhythmias that appear infrequently.

Discuss treatment options or further follow-up

After evaluating the results, the doctor will advise on appropriate options based on Tiptory's cardiovascular condition.

• Continue monitoring if no concerning abnormalities are detected.
• Adjust current medications if necessary.
• Prescribe additional specialized tests.
• Develop a treatment plan for detected cardiovascular diseases.

Results may be received by phone

In some cases, if the results are simple or show no significant abnormalities, the doctor may communicate directly by phone instead of requiring an in-person follow-up visit.

• Monitor calls or notifications from the medical facility.
• Note down the instructions provided by the doctor.
• Schedule an additional appointment if requested.

Follow-up is the final step to complete the Holter ECG procedure

Receiving and correctly understanding the Holter ECG results helps Tiptory understand the heart's activity, detect early signs of arrhythmias, and thus have appropriate monitoring or treatment. This is an important step to optimize the value of the entire Holter ECG monitoring process and protect long-term cardiovascular health.

Notes when wearing a Holter ECG

Device sizes may vary

Current Holter ECG devices come in various designs and sizes. Some compact models are only the size of a deck of cards, while specialized devices may come with more wires and larger data recorders.

• Smaller devices are usually lightweight and easy to carry.
• Some machines use 4 electrodes, while others may use more.
• For larger devices, the data recorder is usually worn around the neck or attached to the belt according to the medical staff's instructions.

Limit activities that cause excessive sweating

Sweat and moisture can reduce electrode adhesion, affecting the quality of data recorded by the Holter ECG.

• Avoid strenuous exercise that causes excessive sweating.
• Limit outdoor activities in excessively hot weather.
• Keep the device and electrode area dry throughout the monitoring period.

Avoid exposing the device to water

Water can damage the device or cause electrodes to detach from the skin.

• Do not shower, bathe, or swim while wearing the device.
• Avoid exposing the device to rain or other water sources.
• Dry immediately if moisture is detected near the electrode site.

Address loose wires or electrodes immediately

During daily activities, wires or electrodes may become loose or detach from their original position. Prompt correction helps minimize data loss during monitoring.

• Check the device periodically throughout the day.
• Reattach wires or electrodes according to the provided instructions.
• Use medical tape to secure if necessary.
• Contact the medical facility if you cannot fix it yourself.

Record all abnormal symptoms thoroughly

The monitoring diary is an important supplement to the data from the 24-hour or 48-hour Holter ECG machine. These notes help the doctor identify the connection between actual symptoms and the heart's electrical activity.

• Record the exact time symptoms appear.
• Describe symptoms such as palpitations, chest pain, shortness of breath, or dizziness.
• Note the activity being performed when symptoms occurred.
• Submit the monitoring diary with the device upon completion of the test.

Follow instructions correctly for more accurate results

Proper use of the Holter ECG throughout the monitoring period helps the doctor collect complete and reliable data. This is an important basis for detecting signs of arrhythmias, evaluating treatment effectiveness, and developing an appropriate cardiovascular health care plan.

References

1. American College of Cardiology Foundation, American Heart Association, & Heart Rhythm Society. (2017). Guideline for the evaluation and management of patients with syncope. Journal of the American College of Cardiology, 70(5), e39–e110.
2. Barrett, P. M., Komatireddy, R., Haaser, S., Topol, S., Sheard, J., Encinas, J., Fought, A. J., & Topol, E. J. (2014). Comparison of 24-hour Holter monitoring with 14-day novel adhesive patch electrocardiographic monitoring. American Journal of Medicine, 127(1), 95.e11–95.e17.
3. Crawford, M. H., Bernstein, S. J., Deedwania, P. C., DiMarco, J. P., Ferrick, K. J., Garson, A., Green, L. A., Greene, H. L., Silka, M. J., Stone, P. H., Tracy, C. M., & Gibbons, R. J. (1999). ACC/AHA guidelines for ambulatory electrocardiography. Journal of the American College of Cardiology, 34(3), 912–948.
4. Goldberger, A. L., Goldberger, Z. D., & Shvilkin, A. (2017). Goldberger’s Clinical Electrocardiography: A Simplified Approach (9th ed.). Elsevier.
5. Josephson, M. E. (2016). Clinical Cardiac Electrophysiology: Techniques and Interpretations (5th ed.). Wolters Kluwer.
6. Kusumoto, F. M., Schoenfeld, M. H., Barrett, C., Edgerton, J. R., Ellenbogen, K. A., Gold, M. R., Naccarelli, G. V., Pacold, I. V., Slotwiner, D. J., & Stevenson, L. W. (2018). ACC/AHA/HRS guideline on the evaluation and management of patients with bradycardia and cardiac conduction delay. Circulation, 140(8), e382–e482.
7. Olgin, J. E., Zipes, D. P., & Libby, P. (2022). Braunwald’s Heart Disease: A Textbook of Cardiovascular Medicine (12th ed.). Elsevier.
8. Steinberg, J. S., Varma, N., Cygankiewicz, I., Aziz, P., Balsam, P., Baranchuk, A., Cantillon, D. J., Dilaveris, P., Dubner, S. J., El-Sherif, N., Krol, R. B., & Piotrowicz, E. (2017). 2017 ISHNE-HRS expert consensus statement on ambulatory ECG and external cardiac monitoring. Heart Rhythm, 14(7), e55–e96.
9. Zimetbaum, P. J., & Goldman, A. (2010). Ambulatory arrhythmia monitoring: Choosing the right device. Circulation, 122(16), 1629–1636.
10. National Heart, Lung, and Blood Institute. (2024). Holter and event monitors. U.S. Department of Health and Human Services.
11. Mayo Clinic Staff. (2024). Holter monitor: Purpose, preparation, risks, and results. Mayo Clinic Proceedings.
12. Cleveland Clinic. (2024). Holter monitor: What it is, how it works, and what to expect. Cleveland Clinic Journal of Medicine.
    

Content edited by: Leigh Kennedy Ly.

Information consulted and verified by expert: Ava Anderson.