Supraventricular Rhythms: Difference between revisions

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Supraventricular Rhythms (view source)

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'''Supraventricular Rhythms originate from the atria. Examples of supraventricular rhythms are:'''
===Supraventricular tachycardias===
*[[Sinustachycardia]]
{| class="wikitable" border="1" width="610px"
*[[Atrial Rhythm]]
|-
*[[Atrial Flutter]]
| [[Image:atrial_ventricular.png|300px]]
*[[Atrial Fibrillation]]
| [[image:SVT_overview.svg|300px]]
*[[Atrial Tachycardia]]
| [[Image:Svt_algorythm_en.png|300px]]
*[[AVRT|Atrio-ventricular Reentry Tachycardia AVRT]]
|-
 
!Arrhythmias are categorized into supraventricular and ventricular depending on their origin (below the bifurcation of the His bundle is ventricular)
'''Supraventricular [[Ectopic Beats|ectopic beats]] can result in:'''
!An overview of pathological supraventricular arrhythmias and their origin
*[[Atrial Premature Complexes]]
!Algorithm to diagnose SVTs<cite>ACC</cite>
*[[Wandering Pacemaker]]
|}
*[[AV-nodal complexes]]
 
'''Also read:'''
*Flowchart: [[Media:narrow_tachycardia_flow.png|Approach to the Narrow Complex Tachycardia]] Adapted from <cite>ESCnarrowQRS</cite>.
*[[Introduction to Arrhythmias]]
*[[Mechanisms of Arrhythmias]]
*[[Sinus node rhythms and arrhythmias]]
*[[Junctional Tachycardias]]
*[[Ventricular Arrhythmias]]
 
 
{| class="wikitable" font-size="90%"
{| class="wikitable" font-size="90%"
|- style="text-align:center;background-color:#6EB4EB;"
|- style="text-align:center;background-color:#6EB4EB;"
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|-
|-
!
!
!example
!Example (lead II)
!regularity
!Regularity
!atrial frequency
!Atrial frequency
!ventricular frequency
!Ventricular frequency
!origin (SVT/VT)
!Origin (SVT/VT)
!p-wave
!P-wave
!effect of adenosine
![[Effect of adenosine]]
|-  
|-  
| colspan="8" style="text-align:left;background-color:#cfefcf;" | '''Narrow complex (QRS<0.12)'''
| colspan="8" style="text-align:left;background-color:#cfefcf;" | '''Narrow complex (QRS<0.12)'''
|-
|-
! [[Sinustachycardia]]
! [[Sinustachycardia]]
| [[Image:sinustachy_small.svg|200px]]
| [[Image:sinustachy_small.svg|200px|Sinustachycardia - a normal p wave precedes every QRS complex]]
| regular
| regular
| 100-180 bpm
| 100-180 bpm
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|-
|-
! [[Atrial Fibrillation]]
! [[Atrial Fibrillation]]
| [[Image:afib_small.svg|200px]]
| [[Image:afib_small.svg|200px|Atrial fibrillation - irregular rate, no p waves]]
| grossly irregular
| grossly irregular
| 400-600 bpm  
| 400-600 bpm  
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|-
|-
! [[Atrial Flutter]]
! [[Atrial Flutter]]
| [[Image:aflutt_small.svg|200px]]
| [[Image:aflutt_small.svg|200px|Atrial flutter - sawtooth in lead II with 2:1 block]]
| regular (sometimes alternating block)  
| regular (sometimes alternating block)  
| 250-350 bpm  
| 250-350 bpm  
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|-
|-
! [[AVNRT]]  
! [[AVNRT]]  
| [[Image:avnrt_small.svg|200px]]
| [[Image:avnrt_small.svg|200px|ANVRT - rSR' in lead V1]]
| regular  
| regular  
| 180-250 bpm
| 180-250 bpm
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|-
|-
! [[Atrial Tachycardia]]
! [[Atrial Tachycardia]]
| [[Image:atrialtachy_small.svg|200px]]
| [[Image:atrialtachy_small.svg|200px|Atrial tachycardia - like sinustachycardia but the p wave has a different morphology]]
| regular
| regular
| 120-250 bpm  
| 120-250 bpm  
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|-
|-
! [[AVRT|Atrio-Ventricular Reentry Tachycardia (AVRT)- orthodromic]]
! [[AVRT|Atrio-Ventricular Reentry Tachycardia (AVRT)- orthodromic]]
| [[Image:avrt_small.svg|200px]]
| [[Image:avrt_small.svg|200px|AVRT - inverted p wave behind every QRS complex]]
| regular  
| regular  
| 150-250 bpm
| 150-250 bpm
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|-
|-
! [[AVJT|AV junctional tachycardia]]
! [[AVJT|AV junctional tachycardia]]
| [[Image:avnodal_small.svg|200px]]
| [[Image:avnodal_small.svg|200px|AV junctional tachycardia - no or inverted p-waves within QRS complex]]
| regular  
| regular  
| 60-100 bpm
| 60-100 bpm
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|-
|-
! [[Supraventricular tachycardia with block]]
! [[Supraventricular tachycardia with block]]
|
| [[Image:atrial_tachy_with_LBBB_leadII.svg|200px|SVT with block - any SVT combined with LBBB or RBBB]]
| (ir)regular depending on SVT
| (ir)regular depending on SVT
| 150-250 bpm
| 100-250 bpm
| 75-200 bpm
| 75-200 bpm
| atria (SVT)
| atria (SVT)
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|-
|-
! [[AVRT|Atrio-ventricular Reentry Tachycardia (AVRT) - antidrome]]
! [[AVRT|Atrio-ventricular Reentry Tachycardia (AVRT) - antidrome]]
|
|  
| regular  
| regular  
| 150-250 bpm
| 150-250 bpm
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|}
|}


{{Box|
===Supraventricular [[Ectopic Beats|ectopic beats]]===
*[[Atrial Premature Complexes]]
*[[Wandering Pacemaker]]
*[[AV-nodal complexes]]
}}
{{Box|
===Also read===
*[[Introduction to Arrhythmias]]
*[[Mechanisms of Arrhythmias]]
*[[Sinus node rhythms and arrhythmias]]
*[[Junctional Tachycardias]]
*[[Ventricular Arrhythmias]]
}}
{{Box|
==References==
==References==
<biblio>
<biblio>
#ESCnarrowQRS pmid=14563598
#ACC pmid=14563598
</biblio>
</biblio>
}}
[[Category:ECG Textbook]]
Retrieved from "https://en.ecgpedia.org/index.php?title=Special:MobileDiff/5767...12226"

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