Version control: This document is current with respect to 2015 American Heart Association® Guidelines for CPR and ECC. These guidelines are current until they are replaced on October 2020. If you are reading this page after October 2020, please contact ACLS Training Center at for an updated document.

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This is for patients with significant symptoms. The treatment of all patients in distress begins with the basics.  Tachycardia is no different.

The treatment of tachycardia is based on the type of tachycardia.  There are three possible types.  Narrow complex tachycardia which is further divided into sinus tachycardia and supraventricular tachycardia and wide complex tachycardia (possible ventricular tachycardia)

Narrow complex tachycardia must have a QRS duration less than 0.1 seconds.

Sinus tachycardia

Supraventricular tachycardia

Wide complex tachycardia (QRS >0.09secs) — Probable ventricular tachycardia

Always begin with the basics.