From The Vault: RBBB
EMS 12-Lead
JULY 21, 2022
Original publication date July, 2009. Concept Review How do you identify right bundle branch block (RBBB) on the 12 lead ECG? Most of us were told to look for “bunny ears” or to use the “turn signal” method, but all you really need for the ECG diagnosis of RBBB are the following: Supraventricular rhythm QRS duration equal or greater than 120 ms (0.12 s) Terminal R wave in lead V1 Slurred S wave in lead I Let’s look at an example.
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