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paced rhythm with acute M.I.

Paced Rhythm With Acute Anterior Lateral M.I.

Mon, 11/28/2011 - 18:57 -- Dawn

We caution students that the signs of acute M.I. (ST elevation) cannot reliably be seen in cases of wide QRS. This is because, in wide QRS situations like left bundle branch block, ventricular rhythms, or right ventricular pacing, the ST segments will elevate in leads with downward QRS complexes, and depress when the QRS is upright.  These is called discordant ST changes.

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