TY - CHAP M1 - Book, Section TI - Antiarrhythmic Drugs A1 - Katzung, Bertram G. A1 - Kruidering-Hall, Marieke A1 - Trevor, Anthony J. PY - 2019 T2 - Katzung & Trevor's Pharmacology: Examination & Board Review, 12e AB - Cardiac arrhythmias are the most common cause of death in patients with a myocardial infarction or terminal heart failure. They increase in prevalence in the elderly and atrial fibrillation is particularly common in this group. Arrhythmias are also the most serious manifestation of digitalis toxicity and are often associated with anesthetic procedures, hyperthyroidism, and electrolyte disorders. The drugs used for arrhythmias fall into five major groups or classes, but most have very low therapeutic indices and when feasible, nondrug therapies (cardioversion, pacemakers, ablation, implanted defibrillators) are used. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/16 UR - accessmedicine.mhmedical.com/content.aspx?aid=1179217048 ER -