TOPICS: Digoxin, sodium potassium atpase, sodium calcium exchanger, inotropy, contractility, vagus nerve, heart rate, hf, atrial fibrillation, nausea, vomiting, diarrhea, blurry and yellow vision, fatigue, weakness, confusion, arrhythmias, av block, hyperkalemia, hypokalemia, toxicity, renal failure, verapamil, amiodarone, quinidine, antidote, potassium, cardiac pacer, anti digoxin antibodies, magnesium