Beta-adrenergic blockers

Definition

Beta-adrenergic blockers, also known as beta-blockers, are medications that reduce blood pressure by blocking the effects of adrenaline on beta receptors in the heart and blood vessels. They are used to treat various cardiovascular conditions including hypertension, angina, and dysrhythmias.

5 Must Know Facts For Your Next Test

1. Beta-blockers decrease heart rate and contractility, leading to reduced cardiac output.
2. They are classified under Class II antidysrhythmic drugs.
3. Commonly prescribed beta-blockers include metoprolol, atenolol, and propranolol.
4. Beta-blockers can be used in the management of chronic heart failure but must be used cautiously.
5. They are contraindicated in patients with asthma due to potential bronchoconstriction.

Review Questions

• What is the primary mechanism of action for beta-adrenergic blockers?
• Name three common beta-blockers and their primary uses.
• Why should beta-blockers be used cautiously in patients with respiratory conditions like asthma?

Related terms

Adrenergic Receptors:

Proteins located on cells that respond to adrenaline and noradrenaline.

Antidysrhythmic Drugs:

Medications that are used to treat irregular heart rhythms.

Hypertension:

A condition characterized by consistently high blood pressure.