QuestionSBA
QuestionChoice
This is the mechanism of action of Class II antiarrhythmics, such as metoprolol. Flecainide targets sodium channels rather than beta-1-adrenergic receptors.
10026268
d
Inhibits beta-1-adrenergic receptors
QuestionChoice
This is the mechanism of action of adenosine which opens potassium channels, resulting in hyperpolarisation and an increased refractory period. Flecainide targets sodium channels rather than potassium channels.
10026269
e
Opens potassium channels
QuestionChoice
This is the mechanism of action of Class III antiarrhythmics, such as amiodarone. Flecainide targets sodium channels rather than potassium channels.
10026267
c
Inhibit potassium channels
QuestionChoice
Flecainide is a Class I anti-arrhythmic. These drugs inhibit the voltage-gated sodium channels, slowing the steep depolarisation section of the ventricular myocyte action potentials. This increases the refractory period so increases the time between action potentials.
10026265
a
Inhibits voltage-gated sodium channels
QuestionChoice
This is the mechanism of action of Class IV antiarrhythmics, such as verapamil. Flecainide targets sodium channels rather than calcium channels.
10026266
b
Inhibit L-type calcium channels
Concept
Chapter
2693
5885
Class I antiarrhythmics: Sodium-channel blockers
Topic
169
Cardiovascular pharmacology
17651
Annie, a 28-year-old female, is started on flecainide in the acute medical ward for the treatment of paroxysmal supraventricular tachycardia.

What is the mechanism of action of flecainide?
a