Arrhythmias USMLE Step 1 Practice Question
A 64-year-old man with acute anterior wall myocardial infarction presents with frequent premature ventricular contractions. Vital signs show BP 118/76 mmHg, HR 102/min, RR 18/min, and SpO2 98% on room air. Troponin I is elevated at 8.2 ng/mL. Chest X-ray shows no pulmonary edema. He denies prior arrhythmias and takes no antiarrhythmic medications. Which antiarrhythmic preferentially binds ischemic ventricular tissue while minimally affecting atrial tissue?
Answer choices
- AProcainamide
- BAdenosine
- CLidocaineCorrect answer
- DVerapamil
- EAmiodarone
- FFlecainide
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