The correct answer to this question is Amiodarone (Cordarone).
Explanation:
Amiodarone is commonly used for chemical cardioversion in patients with atrial fibrillation. It is an antiarrhythmic medication that helps restore normal heart rhythm. The other medications listed (Lidocaine, Nifedipine, and Nitroglycerin) are used for different purposes:
- Lidocaine: Used for ventricular arrhythmias.
- Nifedipine: A calcium channel blocker used for hypertension and angina.
- Nitroglycerin: Used to relieve chest pain (angina) by dilating blood vessels.