Beta blocker

Definition

Beta blockers are medications that reduce blood pressure by blocking the effects of adrenaline on beta receptors. They are commonly used to manage cardiac conditions such as hypertension, arrhythmias, and heart failure.

5 Must Know Facts For Your Next Test

1. Beta blockers work by decreasing heart rate and dilating blood vessels, which helps lower blood pressure.
2. They are typically classified as Class II antiarrhythmic drugs.
3. Common indications for beta blockers include managing hypertension, angina, myocardial infarction, and some forms of tremors.
4. Patients with asthma or chronic obstructive pulmonary disease (COPD) should use beta blockers cautiously due to potential bronchoconstriction.
5. Side effects can include bradycardia, fatigue, dizziness, and potential worsening of heart failure.

Review Questions

• What is the primary mechanism of action for beta blockers?
• For what cardiac conditions are beta blockers most commonly prescribed?
• Why should patients with respiratory conditions like asthma be cautious when using beta blockers?

Related terms

Adrenergic Receptor: A type of receptor in the nervous system that responds to adrenaline and noradrenaline.

Antidysrhythmic Drugs:

Medications used to treat abnormal heart rhythms.

Calcium Channel Blockers:

A class of drugs that disrupt the movement of calcium through calcium channels, often used to treat hypertension and arrhythmias.