Final answer:
Beta blockers and potassium channel blockers such as amiodarone and procainamide are used to manage ventricular arrhythmias. They affect blood pressure, arrhythmias, and chest pain, and can have adverse effects on different organ systems. Calcium channel blockers also serve to reduce heart contractility and manage cardiac conditions.
Step-by-step explanation:
The drugs in question are used to manage ventricular arrhythmias in patients with coronary artery disease and ischemic cardiomyopathy. These drugs can have adverse effects on different organ systems. Such medications include beta blockers like metoprolol and propranolol, which regulate blood pressure, chest pain (angina), and arrhythmias. They work by blocking ß-receptors related to vasoconstriction and cardioacceleration, hence improving cardiac function.
Potassium channel blockers like amiodarone and procainamide are used to treat cardiac dysrhythmias by impeding the movement of K+ through voltage-gated K+ channels. This affects the action potential within cardiac cells, specifically the repolarization phase where K+ outflow is crucial for returning the cell to its resting state. Lastly, calcium channel blockers contribute to negative inotropic effects, which reduce the strength of the heart's contraction, thereby managing conditions like hyperkalemia and angina pectoris.