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Intraventricular Conduction

No change in size, 04:07, 18 January 2010
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{{Box|
;Criteria for left anterior fascicular block
:left Left axis deviation (<-30°):no No or very small S in lead I:normal Normal small q in lead I
:S > R in leads II and III
:no No or very few QRS widening
}}
[[Image:LAHB.png|thumb|Left anterior hemiblock]]
#A slow heart rate (phase 4 aberration)
Right bundle branch block is most more common, because the right bundle has the longer refractory period. Left bundle branch block accounts for about 1/3rd of cases.
===Phase 3 Aberration===
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