Type 1A antiarrythmics
Block Na channels Prolong AP duration, intermediate kinetics -Procainamide -Quinidine -Disopyramide
Type 1B antiarrythmics
Block Na channels
Shorten AP duration, rapid kinetics
-Lidocaine
-Mexiletine
Type 1C antiarrythmics
Block Na channels Minimal effect on AP duration, slow kinetics -Flecanide -Propafenone -Moricizine
Type 2 antiarrythmics
sympatholitics