Q. The most significant feature of the antiarrhythmic action of is:
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(A)
Suppression of phase-4 depolarization in ventricular ectopic foci
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(B)
Prolongation of action potential duration
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(C)
Prolongation of effective refractory period
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(D)
Depression of membrane responsiveness
β
Correct Answer: (A)
Suppression of phase-4 depolarization in ventricular ectopic foci