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AV Conduction: Difference between revisions
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[[Image:AV_block_sequence.png|thumb|Sequence of AV block from incomplete to complete]] | [[Image:AV_block_sequence.png|thumb|Sequence of AV block from incomplete to complete]] | ||
Conduction disturbances can occur at the level of the sinoatrial (SA) node, the atrioventricular (AV) node and the bundle branch system. | Conduction disturbances can occur at the level of the sinoatrial (SA) node, the atrioventricular (AV) node and the bundle branch system. | ||
In atrioventricular block the conduction between atria and ventricles is disturbed leading to an | In atrioventricular block the conduction between atria and ventricles is disturbed, leading to an increased [[Conduction#PQ interval|PQ interval]] or to drop out of QRS complexes: atrial activity that is not followed by ventricular activity. Three degrees of block can be distinguished. | ||
[[Image:PR_interval_buildup.svg|300px|thumb|right|The PR duration depends on the conduction velocity in the atria, AV node, His bundle, bundle branches and Purkinje fibers.]] | [[Image:PR_interval_buildup.svg|300px|thumb|right|The PR duration depends on the conduction velocity in the atria, AV node, His bundle, bundle branches and Purkinje fibers.]] | ||