Atrioventricular block classification: Difference between revisions
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{{Atrioventricular block}} | {{Atrioventricular block}} | ||
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==Overview== | |||
[[Atrioventricular]] ([[AV]]) [[block]] is a medical condition wherein there is a disturbance in the [[conduction]] of an [[electro-cardiac]] impulse traveling from the [[atria]] to the [[ventricle]], as a result of an [[anatomic]] or [[functional]] aberration in the [[conduction system]]. It is classified into three types, which are the [[first degree AV block]], [[second-degree AV block]], and [[third-degree AV block]]/[[complete AV block]]. | |||
==Classification== | ==Classification== | ||
* [[First | * [[First degree AV block]] | ||
** Prolongation of [[PR interval]] | ** Prolongation of [[PR interval]] of more than 200 milliseconds | ||
* [[Second | * [[Second degree AV block]] also known as [[Mobitz I]] and [[Mobitz II]] | ||
** Type I AV Block ([[ | ** [[Type I AV Block]] ([[Wenckebach]]) | ||
*** Progressive prolongation of the [[PR interval]] before dropped beat. | *** Progressive prolongation of the [[PR interval]] before dropped beat. | ||
*** Usually block is in the [[AV node]] | *** Usually block is in the [[AV node]] | ||
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*** No change in [[PR interval]] before dropped beat | *** No change in [[PR interval]] before dropped beat | ||
*** Usually infranodal | *** Usually infranodal | ||
* [[Complete or Third-Degree AV Block|Third | * [[Complete or Third-Degree AV Block|Third degree AV block]] also known as [[complete heart block]] | ||
** No relationship between atrial and ventricular activity. | ** No relationship between [[atrial]] and [[ventricular]] activity. | ||
==References== | ==References== | ||
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{{WH}} | {{WH}} | ||
{{WS}} | {{WS}} | ||
[[CME Category::Cardiology]] | |||
[[Category:Cardiology]] | [[Category:Cardiology]] | ||
[[Category:Electrophysiology]] | [[Category:Electrophysiology]] | ||
Latest revision as of 23:51, 27 July 2022
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Edzel Lorraine Co, DMD, MD[2]
Overview
Atrioventricular (AV) block is a medical condition wherein there is a disturbance in the conduction of an electro-cardiac impulse traveling from the atria to the ventricle, as a result of an anatomic or functional aberration in the conduction system. It is classified into three types, which are the first degree AV block, second-degree AV block, and third-degree AV block/complete AV block.
Classification
- First degree AV block
- Prolongation of PR interval of more than 200 milliseconds
- Second degree AV block also known as Mobitz I and Mobitz II
- Type I AV Block (Wenckebach)
- Progressive prolongation of the PR interval before dropped beat.
- Usually block is in the AV node
- Type II AV Block
- No change in PR interval before dropped beat
- Usually infranodal
- Type I AV Block (Wenckebach)
- Third degree AV block also known as complete heart block
- No relationship between atrial and ventricular activity.