A 65-year-old woman with a history of paroxysmal supraventricular tachycardia presents with palpitations, dyspnea, and chest discomfort. Vital signs show BP 138/82 mmHg, HR 178 bpm, RR 20/min, and SpO2 98% on room air. ECG demonstrates a narrow-complex tachycardia. She denies prior myocardial infarction. She is initiated on a medication that slows conduction through the atrioventricular node by decreasing L-type calcium current. Which drug has this mechanism of action?
- A)Amiodarone
- B)VerapamilGABARITO
- C)Procainamide
- D)Adenosine deaminase
- E)Lidocaine
Explicação
Verapamil and diltiazem are non dihydropyridine calcium channel blockers that decrease AV nodal conduction by reducing L type calcium current. They are commonly used for rate control in supraventricular arrhythmias. Ver explicação completa e trilha adaptativa →