Several kinds: 1st degree-conduction through the av node is >20 ms. 2nd degree type 1, av conduction lengths till a beat is dropped. 2nd degree type 2: beats drop randomly. 3rd degree:there is complete block between the atrial and the ventricles. Bundle branch block: a pathway below the av node (in the ventricles) is blocked - can be right or left. The left has 2 fasicles.
Answered 12/31/2014
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