Supraventricular Rhythms: Difference between revisions

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*[[AVRT|Atrio-ventricular Reentry Tachycardia AVRT]]
*[[AVRT|Atrio-ventricular Reentry Tachycardia AVRT]]
*[[AVJT|AV junctional tachycardia]]
*[[AVJT|AV junctional tachycardia]]
'''Also read:'''
*Flowchart: [[Media:narrow_tachycardia_flow.png|Approach to the Narrow Complex Tachycardia]] Adapted from <cite>ESCnarrowQRS</cite>.
*[[Mechanisms of Arrhythmias]]
*[[Ventricular Arrhythmias]]
*[[Sinus node rhythms and arrhythmias]]


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==References==
<biblio>
</biblio>

Revision as of 08:02, 23 July 2007

Conduction system en.png

Supraventricular Rhythms originate from the atria. Examples of supraventricular rhythms are:

Also read:

An overview of supraventricular tachycardias
regularity atrial frequency ventricular frequency origin (SVT/VT) p-wave effect of adenosine
Narrow complex (QRS<0.12)
Sinustachycardia regular 100-180 bpm 100-180 bpm sinusnode (SVT) precedes every QRS complex gradual slowing
Atrial Fibrillation grossly irregular 400-600 bpm 75-175 bpm atria (SVT) absent slows down rate; irregularity remains
Atrial Flutter regular (sometimes alternating block) 250-350 bpm 75-150 bpm (3:1 or 2:1 block is most common) atria (SVT) negative sawtooth in lead II temporary reduced conduction (e.g. 4:1)
AVNRT regular 180-250 bpm 180-250 bpm AV-node (SVT) in QRS complex (R') stops
Atrial Tachycardia regular 120-250 bpm 75-200 bpm atria precedes QRS, p wave differs from sinus-p temporary AV-block
Atrio-Ventricular Reentry Tachycardia (AVRT)- orthodromic regular 150-250 bpm 150-250 bpm circle: av-node - ventricles - bypass - atria RP < PR stops
AV junctional tachycardia regular 60-100 bpm 70-130 bpm AV node RP < PR reduces rate
Wide complex (QRS>0.12)
Supraventricular tachycardia with block (ir)regular depending on SVT 150-250 bpm 75-200 bpm atria (SVT) absent temporary increased AV-block (eg 4:1)
Atrio-ventricular Reentry Tachycardia (AVRT) - antidrome regular 150-250 bpm 150-250 bpm circular: bypass - atria - av-node - ventricles RP < PR stops

References

  1. []