Amiodarone is used to treat which of the following conditions?

Amiodarone is primarily indicated for the treatment of life-threatening ventricular arrhythmias. It is a powerful antiarrhythmic medication that works by prolonging the action potential and refractory period in myocardial tissue, which helps stabilize the heart's rhythm. This makes it particularly effective in managing conditions such as ventricular tachycardia and ventricular fibrillation, which are serious and can lead to cardiac arrest if not addressed promptly.

While amiodarone can also be used in some cases for atrial fibrillation, its primary role in emergency and acute care is to manage life-threatening ventricular arrhythmias. It is not indicated for treating high blood pressure or severe anxiety, which indicates its specific application in cardiac care rather than general medical conditions.