Editing Holter monitor (section)

===Analyzing software===

[[File:Cubeholter.jpg|thumb|250px|Screenshot of Holter ECG software]]
After the recording of ECG signal for typically 24 hours, the signal must be analysed. A person would have to listen for the full 24 hours; instead integrated automatic analysis determines different sorts of heart beats, rhythms, etc. The success of the analysis is closely associated with the signal quality, which mainly depends upon the attachment of the electrodes to the patient's body. Incorrect attachment allows electromagnetic disturbance to add noise to the record, particularly with rapid patient movement, impeding processing. Other factors can also affect signal quality, such as muscle tremors, sampling rate and resolution of the digitized signal (high quality devices offer higher sampling frequency).

The automatic analysis commonly provides the physician with information about heart beat morphology, beat interval measurement, [[Heart rate monitor|heart rate variability]], rhythm overview and patient diary (moments when the patient pressed the patient button). Advanced systems also perform spectral analysis, ischemic burden evaluation, graph of patient's activity or PQ segment analysis. Also possible is the ability to monitor and analyse [[pacemaker]] impulse detection, useful for checking pacemaker function.