Which of the Following Antiarrhythmic Drugs Works by Blocking Sodium

question 7

Multiple Choice

Which of the following antiarrhythmic drugs works by blocking sodium channels,thereby shortening phase 3 repolarization in ventricular muscle fibers?

• A)verapamil (Calan)
• B)propranolol (Inderal)
• C)sotalol (Betapace)
• D)lidocaine (Xylocaine)

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