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Information

Narrow QRS, progressive increase in PR interval until a ventricular beat is dropped, then sequence is repeated (See Fig. 122-1B and Fig. 122-1D). Seen with drug intoxication (digitalis, beta blockers), increased vagal tone, inferior MI. Usually transient, no therapy required; if symptomatic, use atropine (0.6 mg IV, repeated × 3-4) or temporary pacemaker.

Outline

Section 8. Cardiology