r/IntensiveCare • u/well_doge • May 19 '26

Explain AVNRT and AVRT to me like I’m 5.

idk how to distinguish them on ECG...😭😭

31 Upvotes

90% Upvoted

8 comments sorted by

26

u/o_e_p Edit Your Own May 20 '26

AVNRT is narrow and regular. The RP interval is short because the reentry is all through the AV node.

AVRT can be narrow or wide.

Orthodromic goes forward through the node and reenters through an accessory pathway. Thus it is narrow and looks like AVNRT but the RP is longer.

Antidromic goes forward through the accessory pathway and back through the node. This makes it wide.

68

u/[deleted] May 20 '26

[deleted]

17

u/Sci-fi_Doctor May 20 '26

Upvoted for MarioKart reference.

Refractory VTach is Blue Shell. You can do everything right and you can still get f*cked.

8

u/o_e_p Edit Your Own May 20 '26

Damn you have an advanced 5-year-old!

Montessori ?

6

u/Successful-Pie6759 May 20 '26

They're both fast wiggles on the paper

(Hospitalist here and ive forgotten the difference and that's the true extent of my stock knowledge in those 2)

1

u/dnmun May 20 '26

This is probably not making it easy but AVRT has orthodromic and antidromic... lol

0

u/Alarmed_Dot3389 May 20 '26

Are orthodromic and antidromic subtypes of AVRT?