Third degree AV block classification: Difference between revisions
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__NOTOC__ | __NOTOC__ | ||
{{Third degree AV block}} | {{Third degree AV block}} | ||
{{CMG}}; {{AE}} {{Soroush}} {{CZ}} | {{CMG}}; {{AE}} {{Sara.Zand}} {{Soroush}} {{CZ}} [[User:Qasim Khurshid|Qasim Khurshid, M.B.B.S [4]]] | ||
==Overview== | ==Overview== | ||
[[Third-degree]] or [[complete atrioventricular block]] suggests no conduction at all from [[atria]] to [[ventricles]] and may be [[paroxysmal]] or [[persistent]] and is usually associated with either a [[junctional]] or [[ventricular]] escape [[rhythm]]. [[Complete atrioventricular block]] may be identified in the setting of [[atrial fibrillation]] when the [[ventricular]] response is [[slow]] (<50 bpm) and [[ regular]]. However, [[junctional rhythm]] in the setting of [[atrioventricular ]] block may be present. | |||
==Classification== | ==Classification== | ||
<ref name="KusumotoSchoenfeld2019">{{cite journal|last1=Kusumoto|first1=Fred M.|last2=Schoenfeld|first2=Mark H.|last3=Barrett|first3=Coletta|last4=Edgerton|first4=James R.|last5=Ellenbogen|first5=Kenneth A.|last6=Gold|first6=Michael R.|last7=Goldschlager|first7=Nora F.|last8=Hamilton|first8=Robert M.|last9=Joglar|first9=José A.|last10=Kim|first10=Robert J.|last11=Lee|first11=Richard|last12=Marine|first12=Joseph E.|last13=McLeod|first13=Christopher J.|last14=Oken|first14=Keith R.|last15=Patton|first15=Kristen K.|last16=Pellegrini|first16=Cara N.|last17=Selzman|first17=Kimberly A.|last18=Thompson|first18=Annemarie|last19=Varosy|first19=Paul D.|title=2018 ACC/AHA/HRS Guideline on the Evaluation and Management of Patients With Bradycardia and Cardiac Conduction Delay: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Rhythm Society|journal=Circulation|volume=140|issue=8|year=2019|issn=0009-7322|doi=10.1161/CIR.0000000000000628}}</ref> | |||
{| class="wikitable" | |||
! align="center" style="background:#4479BA; color: #FFFFFF;" + |Term | |||
! align="center" style="background:#4479BA; color: #FFFFFF;" + |Classification | |||
! align="center" style="background:#4479BA; color: #FFFFFF;" + |Definition | |||
! | |||
|- | |||
| rowspan="3" |[[Atrioventricular block]] | |||
| [[First-degree atrioventricular block]] | |||
| | |||
* P waves associated with 1:1 [[atrioventricular ]] conduction | |||
* PR interval >200 ms | |||
* [[atrioventricular delay]] because no P waves are blocked | |||
|- | |||
| [[Second-degree AV block]] | |||
| | |||
* P waves with a constant rate (<100 bpm) | |||
* [[Atrioventricular conduction]] is present but not 1:1 | |||
*''' [[Mobitz type I]]''' | |||
:*P waves with a constant rate (<100 bpm) | |||
:* Presence of periodic single non conducted P wave associated with P waves before and after the non conducted P wave with inconstant PR intervals | |||
*'''[[Mobitz type II]]''' | |||
:* Presence of P waves with a constant rate (< 100 bpm) with a periodic single non conducted P wave associated with other P waves before and after the non conducted P wave with constant PR intervals (excluding 2:1 atrioventricular block) | |||
*'''2:1 [[atrioventricular block]]''' | |||
:* P waves with a constant rate (or near-constant rate because of [[ventriculophasic sinus arrhythmia]]) rate (<100 bpm), every other P wave conducts to the [[ventricles]] | |||
*'''[[Advanced]], [[high-grade]] or high-degree [[atrioventricular block]]''' | |||
:* ≥2 consecutive P waves at a constant physiologic rate that do not conduct to the [[ventricles ]] with evidence for some [[atrioventricular conduction]] | |||
|- | |||
|[[Third-degree AV block]] ([[complete heart block]]) | |||
| | |||
*No evidence of [[atrioventricular conduction]] | |||
* '''[[Vagally mediated atrioventricular block]]''' | |||
:*Any type of atrioventricular block due to increased [[parasympathetic]] tone | |||
*'''[[Infranodal block]]''' | |||
:* [[Atrioventricular conduction block]] with evidence of conduction block distal to the [[atrioventricular node]] | |||
| | |||
|} | |||
==References== | ==References== | ||
{{reflist|2}} | {{reflist|2}} | ||
[[Category: | [[Category:Medicine]] | ||
[[Category:Electrophysiology]] | [[Category:Electrophysiology]] | ||
[[Category:Cardiology]] | [[Category:Cardiology]] | ||
[[Category:Emergency medicine]] | [[Category:Emergency medicine]] | ||
[[Category: | [[Category:Up-To-Date]] | ||
{{WikiDoc Help Menu}} | {{WikiDoc Help Menu}} | ||
{{WikiDoc Sources}} | {{WikiDoc Sources}} | ||
Latest revision as of 04:59, 22 July 2021
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Third degree AV block Microchapters | |
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Diagnosis | |
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Treatment | |
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Case Studies | |
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Third degree AV block classification On the Web | |
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American Roentgen Ray Society Images of Third degree AV block classification | |
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Risk calculators and risk factors for Third degree AV block classification | |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Sara Zand, M.D.[2] Soroush Seifirad, M.D.[3] Cafer Zorkun, M.D., Ph.D. [4] Qasim Khurshid, M.B.B.S [4]
Overview
Third-degree or complete atrioventricular block suggests no conduction at all from atria to ventricles and may be paroxysmal or persistent and is usually associated with either a junctional or ventricular escape rhythm. Complete atrioventricular block may be identified in the setting of atrial fibrillation when the ventricular response is slow (<50 bpm) and regular. However, junctional rhythm in the setting of atrioventricular block may be present.
Classification
| Term | Classification | Definition | |
|---|---|---|---|
| Atrioventricular block | First-degree atrioventricular block |
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| Second-degree AV block |
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| Third-degree AV block (complete heart block) |
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References
- ↑ Kusumoto, Fred M.; Schoenfeld, Mark H.; Barrett, Coletta; Edgerton, James R.; Ellenbogen, Kenneth A.; Gold, Michael R.; Goldschlager, Nora F.; Hamilton, Robert M.; Joglar, José A.; Kim, Robert J.; Lee, Richard; Marine, Joseph E.; McLeod, Christopher J.; Oken, Keith R.; Patton, Kristen K.; Pellegrini, Cara N.; Selzman, Kimberly A.; Thompson, Annemarie; Varosy, Paul D. (2019). "2018 ACC/AHA/HRS Guideline on the Evaluation and Management of Patients With Bradycardia and Cardiac Conduction Delay: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Rhythm Society". Circulation. 140 (8). doi:10.1161/CIR.0000000000000628. ISSN 0009-7322.