QRS complexes that measure 0.12 seconds or greater and have a heart rate between 20 and 40 bpm indicate that the impulses causing ventricular depolarization are coming from the ________.

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QRS complexes that measure 0.12 seconds or greater and have a heart rate between 20 and 40 bpm indicate that the impulses causing ventricular depolarization are coming from the specialized conducting system of the heart, such as the Purkinje fibers, rather than from the SA node or AV node.

QRS Complexes That Measure 0