Final answer:
β-blockers (Class II antiarrhythmics) are commonly used in clinical practice to treat cardiovascular diseases such as high blood pressure, angina, and arrhythmias.
Step-by-step explanation:
β-blockers, also known as Class II antiarrhythmics, are commonly used in clinical practice for several medical conditions and situations. They are frequently prescribed to treat cardiovascular diseases such as high blood pressure, chest pain (angina), and irregular heart rhythms (arrhythmias). Additionally, β-blockers can be used to manage heart failure symptoms when other medications are not effective.