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Review Question - QID 100647

Sites of Action for Cardiac Drugs Introduction Calcium channel blockers QID: 100647 (M1.CV.14.131)
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QID 100647 (Type "100647" in App Search)
A 65-year-old male with a history of hypertension presents to his primary care physician complaining of multiple episodes of chest pain, palpitations, and syncope. Episodes have occurred twice daily for the last week, and he is asymptomatic between episodes. Electrocardiogram reveals a narrow-complex supraventricular tachycardia. He is treated with diltiazem. In addition to its effects on cardiac myocytes, on which of the following channels and tissues would diltiazem also block depolarization?
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