Question

the nurse is providing care for a patient who is taking atenolol to treat hypertension (htn). which physiologic action does this type of medication provide?

Answer 1

Atenolol is a medication classified as a beta-blocker, typically used to treat hypertension (HTN). The physiologic action of atenolol includes:

1. Blocking the beta-adrenergic receptors in the body, particularly beta-1 receptors in the heart.

2. Reducing the effects of adrenaline and noradrenaline (epinephrine and norepinephrine) on these beta-1 receptors.

3. Consequently, decreasing the heart rate and contractility (force of contraction) of the heart.

4. This leads to a reduction in cardiac output (the amount of blood pumped by the heart per minute).

5. Ultimately, the blood pressure is lowered as a result of reduced cardiac output and decreased peripheral vascular resistance.

In summary, atenolol works by blocking the effects of adrenaline and reducing the heart rate and contractility, resulting in decreased cardiac output and lower blood pressure, thus effectively managing hypertension.