During ECG monitoring, which drug is most likely to cause bradycardia?
Propranolol
Among the drugs listed, propranolol — a non-selective β-blocker — reliably reduces heart rate by blocking the β1-mediated sympathetic drive on the SA node, producing bradycardia on the ECG monitor.
Atropine, dobutamine and epinephrine all increase heart rate (through vagal blockade or β1 stimulation), so they would not cause bradycardia.
Hence, Propranolol.
Similar Questions
During high-dose vasopressor therapy, which ECG change most reliably indicates supply–demand ischemia due to increased afterload?
Which type of stress test involves the use of medication instead of physical exercise?
Which ECG change most reliably indicates quinidine toxicity?
What is the most appropriate initial management for a patient presenting with symptomatic bradyarrhythmia?
What ECG change might be seen after administration of calcium channel blockers?
During ECG recording, which change most strongly suggests a therapeutic digitalis effect rather than myocardial ischemia?
Digitalis exerts its effect primarily on:
Important Questions from Pharmacology
During high-dose vasopressor therapy, which ECG change most reliably indicates supply–demand ischemia due to increased afterload?
Which type of stress test involves the use of medication instead of physical exercise?
Which ECG change most reliably indicates quinidine toxicity?
What is the most appropriate initial management for a patient presenting with symptomatic bradyarrhythmia?
What ECG change might be seen after administration of calcium channel blockers?
