Continuous ECG recording over extended periods to catch heart rhythm problems that come and go.
A Holter Monitor is a small, portable device that continuously records your heart's electrical activity (ECG) over an extended period — ranging from 24 hours up to 7 days (168 hours) depending on what your cardiologist recommends. This is especially useful for catching rhythm problems that are intermittent and may not appear during a brief, standard ECG taken in the clinic.
Electrodes are attached to your chest and connected to the compact recorder, which you wear on a strap or clip to your clothing. You go about your normal daily activities while the device records your heart rhythm continuously in the background.
You'll usually be asked to keep a simple diary of any symptoms — such as palpitations, dizziness or chest discomfort — and the exact time they occur, so these can be matched against the recorded heart rhythm during that period for an accurate diagnosis.
| Aspect | Details |
|---|---|
| Duration of Wear | 24, 48, 72, 96, 120, 144 or 168 hours, as advised by your cardiologist based on how often your symptoms occur |
| Preparation | Wear a comfortable, loose-fitting top; avoid oils or lotions on the chest before electrode placement |
| What Happens | Electrodes are attached to the chest and connected to a small recorder; you continue normal daily activities while noting any symptoms and their timing in a diary |
| After the Test | The device is returned to the clinic, and the recorded rhythm data is analysed and correlated with your symptom diary |
A Holter monitor is recommended when heart rhythm symptoms are intermittent and a standard, brief ECG is unlikely to capture them.
Common Indications
| Also Used For
|
Flexible Monitoring DurationsFrom 24 hours up to a full 7 days, matched to how often your symptoms occur for the best chance of capturing them. | Wearable, Daily-Life RecordingContinue your normal routine while the device records in the background, giving real-world rhythm data. | |
Symptom-Correlated AnalysisYour symptom diary is matched against the recorded rhythm for a precise, evidence-based diagnosis. | Cardiologist-Reviewed ResultsFindings are analysed and explained to you by the cardiology team, with a clear next-step plan. | |
Most standard Holter monitors are not waterproof, so showering or bathing is usually avoided during the monitoring period. Your clinic staff will confirm specific care instructions for your device.
Your cardiologist recommends a duration — from 24 hours up to 7 days — based on how frequently your symptoms occur. More infrequent symptoms generally need a longer monitoring period to have a good chance of being captured.
No — in fact, continuing your normal activities, including exercise if you usually do it, is important, since the goal is to capture your heart's rhythm during real everyday conditions.
That is still useful information. A period without symptoms and without rhythm abnormalities on the recording helps your cardiologist assess the likelihood of a serious rhythm problem, alongside your other test results.
Extended, continuous ECG monitoring to catch intermittent heart rhythm problems, at Apollo Clinic, Shyamnagar.
Disclaimer: The information on this page is general and is not a substitute for a consultation with a qualified cardiologist. Test results should always be interpreted by a doctor in the context of your full clinical picture. All procedures are performed after clinical assessment and informed consent.
apolloclinicshyamnagar1@gmail.com
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