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41 bytes added, 10:15, 26 September 2011
==Ladder diagram==
[[File:Ladder_diagram.svg|thumb|A ladder diagram is a diagram that shows the presumed origin of impulse formation and conduction in the heart.A = atrial, AV = AV node, V = ventricles]]
A ladder diagram is a diagram to explain arrhythmias. The figure shows a simple ladder diagram for normal sinus rhythm, followed by av-nodal extrasystole. The origin of impulse formation (sinus node for the first two beats and AV junction for the third beat) and the conduction in the heart are shown.
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