ECG Features and Principles to Differentiate Wide Complex Tachycardias

By ACA | July 12, 2022

Joining us today to discuss ECG Features and Principles to Differentiate Wide Complex Tachycardias is Adam M. May, M.D. cardiac intensivist, and assistant professor of medicine at Washington University School of Medicine in St. Louis, Missouri. 

Specific topics discussed:
• What are some of the underlying electrophysiologic features you look for when trying to determine the site of origin of a wide complex tachyarrhythmia using the 12-lead ECG?
• You highlighted the importance of AV dissociation in distinguishing VT and SWCT. Can you discuss this concept in more detail, and how AV dissociation might manifest on the ECG?
• What do you mean by term morphologic criteria, and when is this helpful in differentiating WCTs?
• Another criterion we often look for is chest lead concordance. How exactly do you define this, and can you discuss the underlying electrophysiological basis for it as well as its practical value?
• Why is comparing a patient’s WCT ECG and baseline ECG so valuable?

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