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Europace Advance Access published online on February 3, 2006
Europace, doi:10.1093/europace/euj054
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© The European Society of Cardiology 2006. All rights reserved
Received August 4, 2005
Revised October 12, 2005
Accepted November 19, 2005

Article

Long-term continuous external electrocardiographic recording: a review

Frank Enseleit 1 and Firat Duru 1 *

1 Clinic of Cardiology, Cardiovascular Center, University Hospital Zurich, Rämistrasse 100, CH-8091 Zurich, Switzerland

* To whom correspondence should be addressed.
Firat Duru, E-mail: firat.duru{at}usz.ch


  Abstract

Ambulatory electrocardiographic (AECG) monitoring is an essential tool in the diagnostic evaluation of patients with cardiac arrhythmias. Recent advances in solid-state technology have improved the quality of the ECG signals and new dedicated algorithms have expanded the clinical application of software-based AECG analysis systems. These advances, in addition to the availability of inexpensive large storage capacities, and very long-term continuous high-quality AECG monitoring, have opened new potential uses for AECG. New digital recorders have the capability of multichannel simultaneous recordings (from 3 to 12 leads) and for telemetred signal transduction. These possibilities will expand the traditional uses of AECG for arrhythmia detection, as arrhythmia monitoring to assess drug and device efficacies has been further defined by new studies. The analysis of transient ST-segment deviation still remains controversial, but considerably more data are now available, especially about the prognostic value of detecting asymptomatic ischaemia. Heart rate variability analysis has shown promise for predicting mortality rates in cardiac patients at high risk. We review recent advances in this field of non-invasive cardiac testing.

Keywords: Ambulatory electrocardiogram; Holter monitoring; Heart rate variability; Arrhythmia.
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