Dr. Smith's ECG Blog

Instructive ECGs in Emergency Medicine Clinical Content

Associate Editors:
— Pendell Meyers & Ken Grauer (2018)
— Jesse McLaren & Emre Aslanger (2022)
— Willy Frick (2024)

editors

K. Wang Video: Differential Diagnosis of a Variety of Conditions (37 minutes)…..

Regular Narrow QRS tachycardia

Regular Narrow QRS bradycardia

Pauses

Paired QRS

Changing QRS Morphology

ST Elevation in the Precordial Leads

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View Comments (2)
  1. hello doctor smith
    at the 31:00 in the second tracing can we say that there's a terminal QRS distorsionin V3 ? can a terminal QRS distorsion of RS complex morphology occur in V3 or is it supposed to be only in V1 V2 since V3 is the most equal between R and S in the precordium ?

    thank you.

    1. Both V2 and V3 have an S-wave (small in V3, but present), so there is not QRS distortion.
      Steve Smith

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