ECG Interpretation

Anatomy of the ECG QRS Complex • Depolarization of the ventricles • 5 –30mm amplitude • 0.06 –0.10 second duration • May not see all 3 waves • + or –deflection depending on lead Wide QRS (>0.12 sec) may signify ventricular conduction delay or origin. • Notched R wave –BBB • Deep Q wave –prior MI ................
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