Anti-arrhythmic drugs

Question 1

Mechanism of action of class 1 drugs of the Vaughan Williams classification

Answer 1

Sodium channel blockers

Question 2

Stage 2 of the cardiac myocyte action potential is due to…

Answer 2

Influx of calcium via L type channels electrochemically balanced by efflux of potassium

Question 3

Mechanism of action of Class 4 antiarrhythmics

Answer 3

Calcium channel blockers

Question 4

Mechanism of action of lignocaine

Answer 4

sodium channel blocker

Question 5

Examples of Calcium channel blockers used in arrhythmia

Answer 5

Verapamil

Diltiazem

Question 6

Mechanism of action of Class 2 antiarrhythmics

Answer 6

Beta blockers

Question 7

State the mechanism of action and the drug class of Amiodarone

Answer 7

potassium channel blockage 
class III

Question 8

Clinical use of Atenolol with regards to arrhythmias

Answer 8

SVT