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?
- A)Apixaban
- B)Diltiazem
- C)FlecainideGABARITO
- D)Metoprolol
- E)Atropine
Explicação
Class Ic agents such as flecainide are potent sodium channel blockers that can promote serious ventricular arrhythmias in patients with prior myocardial infarction or structural heart disease. They are generally reserved for rhythm control in selected patients... Ver explicação completa e trilha adaptativa →