Third degree AV block classification: Difference between revisions

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==Overview==
==Overview==
There is no established system for the classification for complete heart block. But [[AV dissociation]] can be further classified into two subtypes as [[AV dissociation]] by default and [[AV dissociation]] by usurpation.


==Classification==
==Classification==


There is no established system for the classification of third degree AV block. But [[AV dissociation]] can be further classified into two subtypes as follows:
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===AV Dissociation by Default===
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* In this [[rhythm]] there is an independent [[ventricular pacemaker]] response to slowing of the dominant [[atrial]] [[pacemaker]].
===AV Dissociation by Usurpation===
* In this [[rhythm]] there is acceleration of a latent [[pacemaker]] that takes control of cardiac conduction by exceeding the intrinsic atrial rate.
=== Based on electrocardiogram third degree block can be classified as===
* Regular P-P interval<ref name="Rosen1973">{{cite journal|last1=Rosen|first1=Kenneth M.|title=Chronic Heart Block in Adults|journal=Archives of Internal Medicine|volume=131|issue=5|year=1973|pages=663|issn=0003-9926|doi=10.1001/archinte.1973.00320110047006}}</ref>
* Regular [[R-R interval]]
* No relationship between the [[P waves]] and [[QRS complexes]]
* More [[P waves|P wave]]<nowiki/>s are present than [[QRS complexes]]


==References==
==References==

Revision as of 12:49, 13 June 2021

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Soroush Seifirad, M.D.[2] Cafer Zorkun, M.D., Ph.D. [3] Qasim Khurshid, M.B.B.S [4]

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