Cardiac tamponade electrocardiogram: Difference between revisions
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image:PulsusAlternans.jpg|The above EKG shows [[low voltage QRS complexes]] and [[ | image:PulsusAlternans.jpg|The above EKG shows [[low voltage QRS complexes]] and [[Electrical alternans]] | ||
image:Tamponade-with-alternans.jpg|The above 12 lead EKG shows [[cardiac tamponade]] with [[electrical alternans]] | image:Tamponade-with-alternans.jpg|The above 12 lead EKG shows [[cardiac tamponade]] with [[electrical alternans]] | ||
image:Cardiac tamponade.jpg|[[ | image:Cardiac tamponade.jpg|The above 12 lead EKG shows [[low voltage]] and [[electrical alternans]] in a patient with cardiac tamponade. | ||
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Revision as of 14:28, 23 September 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editors-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Varun Kumar, M.B.B.S.
Overview
The electrocardiogram in cardiac tamponade usually demonstrates sinus tachycardia, and may sometimes show reduced QRS voltage and electrical alternans.
Electrocardiogram
EKG findings of cardiac tamponade are:
- Sinus tachycardia
- Electrical alternans (beat-to-beat alterations in the QRS complex due to the swinging of the heart in pericardial fluid)
- Low voltage QRS complexes ([[Low QRS voltage] is defined as maximum QRS amplitude in precordial lead < 1 mV and < 0.5 mV in the limb leads due to insulating properties of fluid) [1].
- ST segment [2].
- EKG findings of pericarditis and pericardial effusion may be seen if these conditions are accompanying tamponade.
Electrocardiographic Examples
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The above EKG shows low voltage QRS complexes and Electrical alternans -
The above 12 lead EKG shows cardiac tamponade with electrical alternans -
The above 12 lead EKG shows low voltage and electrical alternans in a patient with cardiac tamponade.
