Cardiac Holter Monitoring
What is Holter monitoring and why is it performed?
Holter monitoring is a method of continuous recording of the heart’s electrical activity, during which heart function is monitored over 24 hours or longer. It is also known as Holter ECG and is widely used to detect heart rhythm disorders, assess cardiovascular conditions, and monitor treatment effectiveness.
Unlike a standard ECG, which records heart activity for only a few seconds, Holter monitoring evaluates heart function during everyday activities - walking, working, emotional or physical stress, and sleep. This is especially important when symptoms occur intermittently and may not be captured during a short examination.
Holter monitoring is a safe, non-invasive, and painless procedure suitable for patients of all ages.
What does Holter monitoring show?
Holter monitoring helps detect transient heart rhythm disturbances that may not be recorded on a standard ECG. It allows identification of:
- fast or slow heart rhythms (tachycardia, bradycardia),
- various types of arrhythmias,
- conduction abnormalities,
- pauses in cardiac activity or a tendency toward them,
- ischemic changes during physical or emotional stress,
- nighttime rhythm disturbances and episodes of silent ischemia.
This method is particularly valuable in cases of palpitations, dizziness, fainting, unexplained chest pain, or a sensation of irregular heartbeat.
Indications for Holter monitoring
Holter monitoring is prescribed by a cardiologist in the following situations:
- suspected cardiac arrhythmias,
- unexplained fainting episodes,
- frequent palpitations or irregular heartbeat,
- suspected coronary artery disease,
- evaluation of heart function in hypertension,
- monitoring the effectiveness of antiarrhythmic therapy,
- follow-up after cardiac surgery or interventions.
It can also be used for preventive purposes in individuals with cardiovascular risk factors.
How is Holter monitoring performed?
The procedure is simple and comfortable. Electrodes are attached to the patient’s chest and connected to a small portable device - the Holter monitor. The device is typically worn on a belt or over the shoulder. In some cases, wireless devices that adhere directly to the chest may be used.
During the monitoring period, the patient continues normal daily activities - walking, working, resting, and sleeping. This ensures accurate real-life data collection. Patients are usually advised to keep a diary of activities, symptoms, and emotional states.
Monitoring typically lasts 24 hours but may be extended if necessary.
Analysis and interpretation of results
After completion, the device is removed and the data are processed using specialized software. A cardiologist then analyzes the results.
The analysis includes evaluation of heart rhythm throughout the day, responses to physical and emotional stress, nighttime data, and correlation between symptoms and recorded changes.
The results help refine the diagnosis, assess treatment effectiveness, and adjust therapy if needed.
Advantages of Holter monitoring
The key advantage of Holter monitoring is continuous long-term observation of heart activity, allowing detection of even rare or short-term abnormalities.
Additionally, it reflects heart function under real-life conditions, significantly increasing its diagnostic value.
Where to get Holter monitoring in Yerevan
Holter monitoring in Yerevan is available at “Nairi” Medical Center, where the examination is performed using modern equipment, with an individualized approach and high professional standards, ensuring early detection of heart rhythm disorders and effective treatment.
To schedule an appointment, please call 89 00 or visit “Nairi” Medical Center at 21 Paronyan Street.
Frequently Asked Questions
Holter monitoring is usually performed for 24–48 hours. In some cases, recording may continue for up to 72 hours or longer, depending on the purpose of the examination and how often symptoms occur. The monitoring duration is determined by the physician.
Yes, Holter monitoring can also be performed in children. It is a non-invasive test that allows continuous recording of the child’s heart rhythm during daily activities and sleep. The need for monitoring is determined by medical indications.
A Holter monitor is usually fitted at the medical center, where electrodes are attached to the chest and the patient receives instructions on how to wear the device. The patient can then return to their usual routine and wear the monitor at home, at work, and during other daily activities.
The Holter monitor should be worn throughout the entire prescribed period without removing the device or electrodes on your own. It should also be worn during sleep. It is important to follow the specialist’s instructions and make sure the electrodes do not come loose or shift.
During Holter monitoring, patients can usually continue their normal daily activities, including walking, working, sleeping, and carrying out routine tasks, unless the physician has advised otherwise. The purpose of the test is to record heart activity under everyday conditions.
The diary should include the exact times of major activities during the day and any symptoms that occur. It is important to record, for example, the time of palpitations, chest pain, dizziness, shortness of breath, or other complaints, as well as periods of physical activity, rest, and sleep. These entries are later compared with the Holter recording.
The time required to prepare Holter monitoring results depends on the duration of the recording and the amount of data collected. After the device is returned, the recorded information is analyzed by a specialist and a medical report is prepared. The exact turnaround time should be confirmed with the medical center.
Holter monitoring continuously records the heart’s electrical activity and rhythm, while ambulatory blood pressure monitoring measures blood pressure throughout the day and night. These tests assess different parameters and, when necessary, may be performed at the same time.
A standard ECG records the heart’s electrical activity over a short period of several seconds, while a Holter monitor continuously records the heart rhythm for 24–48 hours or longer. This makes it possible to detect intermittent rhythm disturbances that may not be present during a standard ECG.
While wearing a Holter monitor, the device and electrodes should usually be kept dry unless the specialist has confirmed that the particular device allows temporary disconnection. The monitor and electrodes should not be removed independently. Patients should also avoid equipment or strong magnetic sources that may interfere with the recording and follow the instructions provided by the medical center.
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Updated:
27 October 2026, 10:54Our certificates
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