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

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