Final answer:
Calcium channel blockers such as Amlodipine, Diltiazem, Felodipine, Nifedipine, Nimodipine, Nisoldipine, and Verapamil are Class IV antiarrhythmic agents used to manage cardiac dysrhythmias by inhibiting calcium influx in heart muscle cells.
Step-by-step explanation:
Class IV Antiarrhythmic Calcium Channel Blockers
Certain calcium channel blockers are categorized as Class IV antiarrhythmic agents and are important in the management of cardiac dysrhythmias. The following drugs are examples of calcium channel blockers that fall under this category:
- Amlodipine (Norvasc, Lotrel)
- Diltiazem (Cardizem, Tiazac)
- Felodipine (Plendil)
- Nifedipine (Adalat, Procardia)
- Nimodipine (Nimotop)
- Nisoldipine (Sular)
- Verapamil (Calan, Verelan)
These drugs work by inhibiting the influx of calcium ions during the cardiac muscle's action potential, which leads to a decrease in myocardial contractility, slows the heart rate, and prolongs the cardiac conduction time, particularly in the atrioventricular (AV) node.