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1A, 1B, 1C antiarrhythmics main effect on action potential and list the drugs in each category

User Ruslander
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Final answer:

Potassium channel blockers, such as amiodarone and procainamide, affect the repolarization phase of the action potential by inhibiting the movement of K+ ions through voltage-gated channels in cardiac cells.

Step-by-step explanation:

Potassium channel blockers, such as amiodarone and procainamide, affect the repolarization phase of the action potential. These drugs inhibit the movement of K+ through voltage-gated K+ channels in the cardiac cells. By blocking potassium channels, these medications prolong the action potential duration, which can help regulate abnormal electrical activity in the heart.

User Phanindravarma
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