Electrical alternans: Difference between revisions
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==Overview== | ==Overview== | ||
'''Electrical alternans''' is an [[electrocardiogram|electrocardiographic]] phenomenon of alternation of [[QRS complex]] amplitude or axis between beats. It is seen in [[cardiac tamponade]] and is thought to be related to changes in the [[ventricle (heart)|ventricular]] electrical axis due to fluid in the [[pericardium]]. | '''Electrical alternans''' is an [[electrocardiogram|electrocardiographic]] phenomenon of alternation of [[QRS complex]] amplitude or axis between beats. It is seen in [[cardiac tamponade]] and is thought to be related to changes in the [[ventricle (heart)|ventricular]] electrical axis due to fluid in the [[pericardium]]. |
Revision as of 15:08, 8 September 2012
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Electrical alternans On the Web |
American Roentgen Ray Society Images of Electrical alternans |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Synonyms and keywords: QRS alternans, alternans
Overview
Electrical alternans is an electrocardiographic phenomenon of alternation of QRS complex amplitude or axis between beats. It is seen in cardiac tamponade and is thought to be related to changes in the ventricular electrical axis due to fluid in the pericardium.
The presence of micro-voltage and electrical alternans suggests pericardial effusion and cardiac tamponade.
Electrocardiographic Examples