A Holter monitor is a portable device that continuously records the heart’s electrical activity, typically over 24 to 72 hours. It is an important diagnostic tool for detecting intermittent arrhythmias that may not appear during a standard resting ECG. By recording every heartbeat across a full day or more, it greatly increases the chance of capturing a problem that comes and goes.
Holter monitoring is commonly used to investigate palpitations, dizziness or unexplained fainting. It can also help assess heart rate variability, identify abnormal rhythms, and monitor the effectiveness of treatment or medications. The recorded data is analysed by a cardiologist to detect clinically relevant rhythm disturbances and guide further management.
Holter monitoring suits symptoms that happen often enough to be likely captured within a few days, such as daily or near daily palpitations. If your symptoms are less frequent, a longer 28 day HeartBug monitor may be a better choice. Keeping a simple diary of your symptoms during the recording helps link how you feel to what your heart is doing.
A small, lightweight recorder connects to a few electrodes on your chest. You wear it during normal daily activity and note the time of any symptoms. The device must stay dry, so you avoid swimming or bathing while wearing it. You return the monitor at the end of the recording period for analysis.
Consider Holter monitoring for palpitations, unexplained presyncope or syncope, rate control assessment in known arrhythmia, and evaluation of therapy. Where symptoms are infrequent, extended monitoring improves diagnostic yield. Studies are reported with symptom rhythm correlation by a cardiologist.
