A 30-year-old woman with known Wolff-Parkinson-White syndrome presents with sustained palpitations and chest discomfort. Vital signs: BP 118/76 mmHg, HR 180 bpm, RR 18, SpO2 98% on room air. She denies syncope. ECG demonstrates regular wide-complex tachycardia at 180 bpm consistent with antidromic AV reentrant tachycardia. Troponin is normal. She takes no cardiac medications. Which medication is most appropriate for acute termination of this arrhythmia?
- A)ProcainamideGABARITO
- B)Digoxin
- C)Verapamil
- D)Adenosine
- E)Atropine
Explicação
Antidromic AVRT uses the accessory pathway for antegrade conduction and produces a wide-complex tachycardia. Procainamide is appropriate because it slows conduction in the accessory pathway and atrial myocardium without relying purely on AV nodal blockade. Ver explicação completa e trilha adaptativa →