In cardiology, a wandering atrial pacemaker, also known as WAP, is an atrial arrhythmia that occurs when the natural cardiac pacemaker site shifts between the sinoatrial node (SA node), the atria, and/or the atrioventricular node (AV node). This shifting of the pacemaker from the SA node to adjacent tissues is identifiable on ECG Lead II by morpho...
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http://en.wikipedia.org/wiki/Wandering_pacemaker
A disturbance of the normal cardiac rhythm in which the site of the controlling pacemaker shifts from beat to beat, usually between the sinus and A-V nodes, often with gradual sequential changes in P waves between upright and inverted in a given ECG lead. ... Synonym: shifting pacemaker. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973
wandering atrial pacemaker a condition in which the site of origin of the impulses controlling the heart rate shifts from the head of the sinoatrial node to a lower part of the node or to another part of the atrium.
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http://www.encyclo.co.uk/local/21001
Type: Term Definitions: 1. a disturbance of the normal cardiac rhythm in which the site of the controlling pacemaker shifts from beat to beat, usually between the sinus and AV nodes, often with gradual sequential changes in P waves between upright and inverted in a given ECG lead. Synonyms: shifting pacemaker
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http://www.medilexicon.com/medicaldictionary.php?t=64341
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