Dr. Smith's ECG Blog

Instructive ECGs in Emergency Medicine Clinical Content

Associate Editors:
— Pendell Meyers & Ken Grauer (2018)
— Jesse McLaren & Emre Aslanger (2022)
— Willy Frick (2024)

editors

EP Report back on this case: a very fast narrow complex rhythm followed by a very fast wide complex

This was a very interesting case:

A Very Fast Regular Narrow Complex, Followed by an Equally Fast Regular Wide Complex

It had a very fast narrow complex rhythm, then a very fast wide complex rhythm, then converted to sinus with a very short PR interval.

We surmised that there must be accelerated AV conduction AND an accessory pathway.

The EP results are back, and:

1. Accelerated AV conduction

2. Left lateral accessary pathway.  It was ablated.

Previous Article

A Hybrid of de Winter's T-waves and Diffuse Subendocardial Ischemia: Left Main Ischemia

Next Article

18 hours of intermittent chest pressure

View Comments (2)
  1. Ajr heart is between 60 to 100. But also when we have a differential of a by pass tract.how could one use adenosine,as making prone to afib.one must use class1 antiarrythmic agents.

    1. No, one can use adenosine. If there is a conversion to atrial fib, the effect of the adenosine will be gone by that time and there will be no downside.

Leave a Comment

Your email address will not be published. Required fields are marked *