What is the primary action of an α/β-Adrenergic Blocker like Carvedilol?

What is the primary action of an α/β-Adrenergic Blocker like Carvedilol?

• A. Stimulates heart rate
• B. Decreases blood pressure
• C. Increases blood flow to the heart
• D. Raises heart output

Answer: (B)

The primary action of an α/β-Adrenergic Blocker like Carvedilol is to decrease blood pressure. Carvedilol works by blocking both alpha and beta adrenergic receptors, which leads to a reduction in heart rate and myocardial contractility (due to beta-adrenergic blockade), as well as vasodilation (through alpha-adrenergic blockade). The combined effects result in lowered peripheral vascular resistance and decreased cardiac workload, ultimately leading to a reduction in blood pressure. Carvedilol is commonly used in the management of conditions such as hypertension and heart failure, demonstrating its vital role in controlling blood pressure effectively. This dual receptor antagonism differentiates it from other medications that may act solely on one type of adrenergic receptor.

The primary action of an α/β-Adrenergic Blocker like Carvedilol is to decrease blood pressure. Carvedilol works by blocking both alpha and beta adrenergic receptors, which leads to a reduction in heart rate and myocardial contractility (due to beta-adrenergic blockade), as well as vasodilation (through alpha-adrenergic blockade). The combined effects result in lowered peripheral vascular resistance and decreased cardiac workload, ultimately leading to a reduction in blood pressure.

Carvedilol is commonly used in the management of conditions such as hypertension and heart failure, demonstrating its vital role in controlling blood pressure effectively. This dual receptor antagonism differentiates it from other medications that may act solely on one type of adrenergic receptor.