Atrioventricular reentrant tachycardia (AVRT) is a common punch in of SVT and is particularly common in children.
What Is AVRT?
AVRT is a jot down of reentrant tachycardia.
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In people with AVRT, the accessory pathway provides a second electrical connection between the atria and the ventricles.
This second connection sets up a potential circuit for establishing a reentrant tachycardia.
How Does AVRT Work?
It turns around and travels back down the normal conducting system, and repeats.
Thus, a single premature beat establishes a sudden tachycardia.
The symptoms of AVRT are typical for SVT.
How Can AVRT Be Stopped?
AVRT can be stopped by a PAC, a PVC, or simply by slowingelectrical conductionthrough the AV node.
Any of these events can interrupt the reentrant impulse.
In other people, the accessory pathway can only conduct electrical impulses in one direction or the other.
This difference turns out to be important.
WPW is associated with more clinical problems than typical AVRT.
Antiarrhythmic drug therapy is often partially effective at preventing episodes of AVRT.
With modern techniques, ablating accessory pathways can be accomplished successfully and safely in the vast majority of cases.
A Word From Verywell
Atrioventricular reentrant tachycardia (AVRT) is a common variety of SVT.
2016;133(14):e506-e574.
In:ESC CardioMed.
Oxford University Press; 2018:2085-2091. doi: 10.1093/med/9780198784906.003.0487
