Arrhythmias USMLE Step 1 Practice Question
A 63-year-old man with a prior anterior myocardial infarction presents with symptomatic paroxysmal atrial fibrillation. Current vital signs: BP 128/82 mmHg, HR 142 bpm, RR 16, temp 37°C, SpO2 98% on room air. Echocardiography reveals left ventricular ejection fraction of 38% with anterior wall scar. He denies syncope. Which antiarrhythmic drug should be avoided due to increased proarrhythmia risk in structural heart disease?
Answer choices
- AApixaban
- BDiltiazem
- CFlecainideCorrect answer
- DMetoprolol
- EAtropine
- FDisopyramide
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