Final answer:
For treating PVCs associated with MI, Metoprolol, a beta blocker, is often used due to its ability to reduce the heart's oxygen demand and stabilize electrical activity. While Amiodarone, a potassium channel blocker, treats various cardiac dysrhythmias by affecting repolarization phases of action potentials, Metoprolol is preferred for PVCs post-MI. Therefore, the correct option is C.
Step-by-step explanation:
Treatment for PVCs of MI
To treat premature ventricular contractions (PVCs) associated with myocardial infarction (MI), the drug Metoprolol, a beta blocker, is often used. This is because beta blockers like Metoprolol can help reduce the heart's oxygen demand and stabilize electrical activity, making them effective for managing PVCs post-MI. Potassium channel blockers, such as Amiodarone, are also utilized for various cardiac dysrhythmias, but they act by inhibiting the movement of K+ through voltage-gated K+ channels affecting the repolarization and duration of the action potential. Despite Amiodarone's use in some dysrhythmic conditions, beta blockers are the first line of treatment for PVCs after an MI.
Calcium channel blockers Amlodipine Diltiazem Felodipine are medications that are used to diminish the strength of the heart's contraction and cardiac output, but they are generally not the first choice for treating PVCs post-MI. The correct answer to the question "What drug will be used to treat PVCs of MI?" is c) Metoprolol.