Which of the following medications will block the influx of calcium ions during phase 0 of the slow potential in the heart?
A) Amiodarone (Cordarone)
B) Lidocaine (Xylocaine)
C) Esmolol (Brevibloc)
D) Digoxin (Lanoxin)

Question

Quizplus · Accepted Answer

Esmolol (Brevibloc) is a beta-blocker that can block the influx of calcium ions during phase 0 of the slow potential in the heart. Amiodarone (Cordarone) and lidocaine (Xylocaine) block sodium channels, while digoxin (Lanoxin) inhibits sodium-potassium-ATPase.

Which of the Following Medications Will Block the Influx of Calcium