Flecainide Toxicity on ECG 70 year old patient with chronic atrial fibrillation on an antiarrhythmic presented with nausea and hypotension. Potassium normal and creatinine slightly elevated. https://twitter.com/BrettSperryMD https://twitter.com/BrettSperryMD #Flecainide #Toxicity #ECG #EKG #Electrocardiogram #Cardiology #Clinical