AV nodal reentrant tachycardia

Is this an accelerated idioventricular rhythm, right? Is this a junctional tachycardia? Is this something else with a wide complex not originating, right? We talk about supraventricular tachycardias within the field of EMS as SVT.

Typically, what we're thinking about is actually AVNRT or AV nodal reentry tachycardia.

SVT, supraventricular tachycardias, just refers to tachycardias that originate above the ventricles, above the AV node.

So certainly you can have some wider complex appearing supraventricular tachycardias that are not themselves VT that you could be treating the patient with your VT algorithm internally or whatever protocol or guideline you're following.

That's just the way that I- I think you're both talking about SVTs in two different definitions.

I think

you're talking about SVT, how we normally refer to SVT as the AVNRT.

I think you're talking about Y-complex supraventricular tachycardia is not AVNRT as you're talking

SVT usually means irregular, narrow, complex tachycardia with sudden onset and offset, often in young, otherwise healthy people.

The commonest type is AV nodal reentrant tachycardia or AVNRT, where the circuit lies within the AV node itself using a slow and a fast pathway.

It is more common in women.

The second type is AV reentrant tachycardia, or AVRT, which uses an accessory pathway.

And the third is focal atrial tachycardia.

On the ECG in AVNRT, the P wave is often hidden or appears as a small pseudo R prime in lead V1.

Acute treatment begins with vagal maneuvers.

The modified Valsalva maneuver tested in the REVERT trial is far more effective than the standard one.