SVT with Aberrancy
February 15th, 2021
Overview
Supraventricular tachycardias in the presence of either bundle branch block or pre-excitation (accessory pathway) will present with a regular wide complex tachycardia that is often difficult to distinguish from ventricular tachycardia.
Look For
- Heart rate 100-250bpm
- Regular rhythm
- Broad QRS complex >120ms
On Old ECGs
- Bundle branch block
- Wolff-Parkinson-White pattern
Examples
- SVT with left bundle branch block:
![SVT with left bundle branch block]()
- SVT with right bundle branch block:
![SVT with right bundle branch block]()
To find out how to distinguish SVT with aberrancy from VT, read the section called 'distinguishing VT and SVT with aberrancy'.
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