A 58-year-old woman with a history of myocardial infarction presents with recurrent ventricular ectopy. Her physician is comparing propranolol (Class II) and sotalol (Class III with beta-blocking properties) for rhythm control. Which finding would best distinguish the primary electrophysiological effect of propranolol from that of sotalol?

See the options, answer & explanation

Sign in free to reveal the answer choices, the correct answer, the detailed explanation, and AI-powered insights for this question.