SVT with Aberrancy



  • 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'.
Last updated on December 29th, 2018
Want more info like this?
  • Your electronic clinical medicine handbook
  • Guides to help pass your exams
  • Tools every medical student needs
  • Quick diagrams to have the answers, fast
  • Quizzes to test your knowledge