Final answer:
Antiarrhythmic drugs, such as beta-blockers (propranolol, metoprolol) and calcium channel blockers, work by treating abnormal heart rhythms. Negative inotropic agents, however, may not fall into this category as they function differently.
Step-by-step explanation:
Without specific drug options, this question cannot be definitively answered. However, antiarrhythmic drugs are typically used to treat abnormal heart rhythms. This category of drugs includes beta-blockers and calcium channel blockers. Beta-blockers like propranolol and metoprolol are used to block the beta-receptors involved in vasoconstriction and cardioacceleration, leading to improved cardiac function. Similarly, calcium channel blockers, such as dihydropyridine, phenylalkylamine, and benzothiazepine drugs, work by reducing the strength of heart contractions.
On the other hand, Negative inotropic agents, including a variety of synthetic drugs, hypoxia, acidosis, and hyperkalemia, seem to function differently by reducing the strength of heart muscle contraction, and therefore, might not be considered as antiarrhythmic drugs.
Learn more about Antiarrhythmic Drugs