Narrow Complex Tachycardias

Intro

The differential for narrow complex tachycardia is extremely important as it is the most commonly seen abnormal EKG in the emergency department. It includes rhythms such as sinus tachycardia, AVnRT, AVRT, atrial flutter, ectopic atrial tachycardia (EAT), atrial fibrillation, atrial flutter, and multifocal atrial tachycardia (MAT).

The goal of this blog is to run through this differential and give some methods to differentiate the rhythms. Although we will not delve too deep into antiarrhythmics, it is important to note that electricity is safe in all unstable rhythms no matter the etiology.