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Clinical Utility of aVR—The Neglected Electrocardiographic Lead

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Background: Several studies suggest that electrocardiographers tend to neglect lead aVR during the reading of electrocardiograms (ECGs). Our objective was to provide a systematic review of the most important diagnostic and prognostic uses of lead aVR.

Methods: We performed a thorough review of the literature about the lead aVR using PubMed, MEDLINE and the archives of the University at Buffalo libraries.

Results: We found that lead aVR may provide important additional information in the diagnosis of coronary artery disease. It may provide a clue to the location of a lesion as well as the possibility of three vessel disease during an acute coronary syndrome. Lead aVR was found useful in the locus of arrhythmias and in differentiation of narrow and wide QRS complex tachycardias. It provides useful prognostic information for patients with the Brugada syndrome and tricyclic antidepressant toxicity. Lead aVR provides alternative criteria for the electrocardiographic diagnosis of left ventricular hypertrophy and left anterior fascicular block.

Conclusion: Lead aVR provides very important additional diagnostic and prognostic information in multiple cardiac conditions and can be used either alone or in conjunction with other electrocardiographic leads.

Ann Noninvasive Electrocardiol 2010;15(2):175–180
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Keywords: Brugada syndrome; coronary artery disease; lead aVR; narrow complex tachycardias, wide complex tachycardias; tricyclic antidepressant toxicity

Document Type: Review Article

Affiliations: 1: State University of New York at Buffalo, Buffalo, NY 2: Ural Medical Academy, Ekaterinburg, Russia 3: Buffalo Electrophysiology LLC, Buffalo, NY

Publication date: April 1, 2010

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