Medical MCQ-Which of the following antiarrhythmic drugs can decrease the slope of Phase 0 and prolong the action potential duration?

Which of the following antiarrhythmic drugs can decrease the slope of Phase 0 and prolong the action potential duration?

Lignocaine

Propanolol

Quinidine

Adenosine

Question Category:

Pharmacology

Correct Answer:

Quinidine

Description:

Na+ channel blockers reduce the slope of phase 0 whereas K+ channel blockers prolong the APD. Both of these propeies are present in class Ia antiarrhythmics like quinidine and procainamide.

Previous MCQ

Next MCQ

Get More

Subject Mock Tests

Try practicing mock tests with over 200,000 questions from various medical subjects.

Attempt a mock test now

Mock Exam

Attempt an exam of 100 questions randomly chosen from all subjects.

Coming Soon