Tag Archives: terminal deflection

Right bundle branch block – Part I

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How do you identify RBBB on the 12 lead ECG? Forget about turn signals and bunny ears! All you need for the ECG diagnosis of RBBB are the following: A supraventricular rhythm QRS duration equal or greater than 120 ms (0.12 s) Terminal R wave in lead V1 S wave in lead I It’s that […]

Identifying STEMI in the presence of LBBB – Sgarbossa's Criteria – Part I

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There has been a lot of discussion lately about identifying AMI in the presence of LBBB (see Dr. Bearemy’s “My Emergency Medicine Blog” here and a recent thread on the EKG Club). I’ve also been receiving a lot of emails offlist, so I think a full discussion is in order. In my recent post Who […]