Final answer:
The first-line drugs for symptomatic hypertrophic cardiomyopathy are β-blockers and calcium channel blockers. These drugs are commonly used to treat cardiovascular conditions including high blood pressure and heart failure.
Step-by-step explanation:
The first-line drugs for symptomatic hypertrophic cardiomyopathy are β-blockers and calcium channel blockers. These drugs are commonly used to treat cardiovascular conditions including high blood pressure and heart failure. Examples of β-blockers include propranolol and metoprolol, which block the β-receptors associated with vasoconstriction and cardioacceleration. Calcium channel blockers, such as diltiazem and verapamil, decrease the strength of contraction and stroke volume by blocking the influx of calcium ions.