A 66-year-old man develops frequent premature ventricular complexes 6 hours after acute anterior wall myocardial infarction. Vital signs show BP 118/76 mmHg, HR 102 bpm, RR 20/min, and troponin I elevation to 8.5 ng/mL. He denies chest pain currently and has normal oxygen saturation. He is not on beta-blockers or ACE inhibitors. An antiarrhythmic agent that preferentially binds inactivated sodium channels in ischemic tissue and shortens action potential duration is administered. Which drug was most likely used?
- A)Verapamil
- B)Digoxin
- C)LidocaineGABARITO
- D)Sotalol
- E)Quinidine
Explicação
Lidocaine is a class Ib antiarrhythmic that is particularly useful for ventricular arrhythmias in ischemic myocardium after myocardial infarction. It binds inactivated sodium channels and shortens repolarization in ventricular tissue. Ver explicação completa e trilha adaptativa →