Document Detail

Ventricular late potentials: a critical overview and current applications.
MedLine Citation:
PMID:  18455179     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: More than 450 000 Americans die suddenly each year from sustained ventricular tachycardia (VT) or fibrillation. Overall, event rates in Europe are similar to those in the United States. A correct risk stratification is essential to reduce the incidence of sudden cardiac death. Ventricular late potentials (VLPs) represent delayed conduction through a diseased myocardium and consist of the presence of electrical activity after the end of the standard QRS. The VLPs are potential substrates for reentry VT.
CLINICAL APPLICATIONS: The VLPs were found highly predictive of cardiac events, in particular, arrhythmic events, in patients with acute myocardial infarction. The weakness of VLPs is the low positive predictive value, especially as a single technique. However, their negative predictive value for arrhythmic events is very high. The VLPs are observed in more than 50% of patients with arrhythmogenic right ventricular cardiomyopathy, and are actually considered a helpful diagnostic tool in this setting. In patients with syncope of unknown cause, VLP analysis, combined with patient history and other diagnostic tests, can help identify or exclude a mechanism of VT as a cause of the syncope.
CONCLUSIONS: The VLP assessment offers a practical and low-cost tool to the clinical cardiologist to recognize the possible electrophysiologic substrate underlying life-threatening ventricular arrhythmias. The strength of VLPs is their high negative predictive value. When positive, VLPs still help better stratify the arrhythmic risk of patients in several clinical settings.
Pasquale Santangeli; Fabio Infusino; Gregory Angelo Sgueglia; Alfonso Sestito; Gaetano Antonio Lanza
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Publication Detail:
Type:  Journal Article; Review     Date:  2008-05-01
Journal Detail:
Title:  Journal of electrocardiology     Volume:  41     ISSN:  1532-8430     ISO Abbreviation:  J Electrocardiol     Publication Date:    2008 Jul-Aug
Date Detail:
Created Date:  2008-06-23     Completed Date:  2008-08-21     Revised Date:  2013-07-15    
Medline Journal Info:
Nlm Unique ID:  0153605     Medline TA:  J Electrocardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  318-24     Citation Subset:  IM    
Istituto di Cardiologia, Università Cattolica del Sacro Cuore, 00168 Roma, Italy.
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MeSH Terms
Diagnosis, Differential
Electrocardiography / methods*
Tachycardia, Ventricular / diagnosis*
Ventricular Fibrillation / diagnosis*

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