Antiarrhythmic Drugs and Associated Arrhythmias.
![Image](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQS-u1qBzmYXNLZ4FD26OAZQA7rwPXdhpNCKerUFfGCh4RDMCfE1C6G1wmBVrJW-PNyaoCrb_KEmmwrAPZrekpe1ZUmsuJy_78RrPFudSHBFu90wDtWkIiSG6300fU30f8kpBEexpl5U0u/s640/antiarythmic.jpg)
Class I: Fast sodium (Na) channel blockers: Ia - Quinidine, procainamide, disopyramide (depress phase 0, prolonging repolarization) Ib - Lidocaine, phenytoin, mexiletine (depress phase 0 selectively in abnormal/ischemic tissue, shorten repolarization) Ic - Flecainide, propafenone, moricizine (markedly depress phase 0, minimal effect on repolarization)