Wandering atrial pacemaker: Difference between revisions
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==EKG examples== | ==EKG examples== | ||
[[Image:Rhythm WAP.png|thumb|250px|left|Wandering pacemaker. Every p-wave is different and thus has a different origin.]] | [[Image:Rhythm WAP.png|thumb|250px|left|Wandering pacemaker. Every p-wave is different and thus has a different origin.]] | ||
[[Image:Rhythm WAP.png|thumb|left]] | [[Image:Rhythm WAP.png|thumb|left]] | ||
Revision as of 20:32, 21 August 2009
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Overview
This atrial arrhythmia occurs when the natural cardiac pacemaker site shifts between the SA node, the atria, and/or the AV node. This shifting of the pacemaker from the SA node to adjacent tissues is manifested electrocardiographically by transient changes in the size shape and direction of the P waves. A wandering pacemaker is usually caused by varying vagal tone. With increased vagal tone the SA Node slows,allowing a pacemaker in the atria or AV Nodal area,which may become slightly faster briefly. After vagal tone decreases the SA Node becomes the pacemaker again.
EKG examples
Additional resources
- ECGpedia: Course for interpretation of ECG
- The whole ECG - A basic ECG primer
- 12-lead ECG library
- Simulation tool to demonstrate and study the relation between the electric activity of the heart and the ECG
- ECG information from Children's Hospital Heart Center, Seattle
- ECG Challenge from the ACC D2B Initiative
- National Heart, Lung, and Blood Institute, Diseases and Conditions Index
- A history of electrocardiography
- EKG Interpretations in infants and children
- Atrial Fibrillation Management Cleveland Clinic