A client with atrial fibrillation has been started on a calcium channel blocker to help control the ventricular rate.The nurse knows that calcium channel blockers slow the heart rate and prolong the refractory period, and that what might be noted on the EKG?
A) Widening of the PR interval
B) Widening of the QRS complex
C) Widening of the QT interval
D) Inverted T waves
Correct Answer:
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