Flecainide and propafenone are the IC agents in use for atrial fibrillation. Encainide and moricizine were predominantly used for ventricular arrhythmias and encainide was pulled a long time ago due to proarrhythmia concerns and I believe Ethmozine stopped being marked many years ago.The CAST t...

Thanks for all the very thoughtful comments. These are most helpful. Thanks for also providing the references. I appreciate it. I have struggled with this question for many years. I have many patients who are over 80 years old and have been doing extremely well on Flecainide as regards their atrial...