Ectopic atrial rhythm: Difference between revisions
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===Ectopic Atrial Rhythm EKG Examples=== | ===Ectopic Atrial Rhythm EKG Examples=== | ||
Shown below is an EKG showing ectopic atrial rhythm. In this example, the [[sinus node]] stopped pacing due to [[ischemia]] during an [[atrial infarction]]. The [[P wave]] is positive in [[Electrocardiogram#Limb|I]], and negative in [[Electrocardiogram#Limb|III]], and [[Electrocardiogram#Augmented limb|aVF]]. The atrial [[pacemaker]] is thus situated at the bottom of the right atrium, close to the [[AV node]]. | Shown below is an EKG showing ectopic atrial rhythm. In this example, the [[sinus node]] stopped pacing due to [[ischemia]] during an [[atrial infarction]]. The [[P wave]] is positive in [[Electrocardiogram#Limb|lead I]], and negative in [[Electrocardiogram#Limb|III]], and [[Electrocardiogram#Augmented limb|aVF]]. The atrial [[pacemaker]] is thus situated at the bottom of the right atrium, close to the [[AV node]]. | ||
[[File:Ectopic Atrial Rhythm 1.png|500px|center]] | [[File:Ectopic Atrial Rhythm 1.png|500px|center]] | ||
Revision as of 21:20, 24 October 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]
Electrocardiogram
- There is a different P wave morphology than in Normal Sinus Rhythm (NSR)
- The sinus rate is < 100 beats per minute
- The rhythm is called an accelerated atrial rhythm when the rate is faster than the patient's own NSR but < 100 beats per minute.
Ectopic Atrial Rhythm EKG Examples
Shown below is an EKG showing ectopic atrial rhythm. In this example, the sinus node stopped pacing due to ischemia during an atrial infarction. The P wave is positive in lead I, and negative in III, and aVF. The atrial pacemaker is thus situated at the bottom of the right atrium, close to the AV node.
Copyleft images obtained courtesy of ECGpedia, http://en.ecgpedia.org
External Links
References
- Hammill S. C. Electrocardiographic diagnoses: Criteria and definitions of abnormalities, Chapter 18, MAYO Clinic, Concise Textbook of Cardiology, 3rd edition, 2007 ISBN 0-8493-9057-5