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Two patients with RBBB

Dr. Smith's ECG Blog

Although as a general rule, there should be no ST elevation in RBBB in the absence of ischemia, there sometimes is ST elevation that looks like this. There is also much STE in V3-V6, especially V4-V6, that must be considered to be STEMI. The challenge is magnified when trying to assess BBB tracings for acute ischemia.

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ECG Blog #472 — At Least 4 Major Findings

Ken Grauer, MD

PEARL # 3: Knowing there is an acute inferior STEMI I looked next to see if there is also acute posterior involvement ( which so often accompanies inferior MI ). But larger-than-expected Q waves in each of the inferior leads ( especially in lead III ) are probably the result of this patients ongoing acute inferior STEMI.

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