Ambulatory ECG – ambulatory or Holter ECG is performed using a portable recording device that is worn for at least 24 hours. The patient is free to move around normally while the monitor is attached. This type of ECG is used for patients whose symptoms are intermittent and may not appear during a resting ECG. People recovering from heart attack may be monitored in this way to ensure proper heart function. The patient usually records symptoms in a diary, noting the time so that their own experience can be compared with the ECG.
A Holter monitor is a small, battery-powered medical device that measures your heart’s activity, such as rate and rhythm. Your doctor may ask you to use one if they need more information about how your heart functions than a routine electrocardiogram (EKG) can give them.
Twenty-four hour Holter monitoring is a continuous test to record your heart’s rate and rhythm for 24 hours. You wear the Holter monitor for 12 to 48 hours as you go about your normal daily routine. This device has electrodes and electrical leads exactly like a regular EKG, but it has fewer leads. It can pick up not only your heart’s rate and rhythm but also when you feel chest pains or exhibit symptoms of an irregular heartbeat, or arrhythmia.