beta blocker

American  

Or beta-blocker

noun

Pharmacology.

1. any of various substances that interfere with the action of the beta receptors: used primarily to reduce the heart rate or force in the prevention, management, or treatment of angina, hypertension, or arrythmias.

---

beta-blocker British  

noun

1. any of a class of drugs, such as propranolol, that inhibit the activity of the nerves that are stimulated by adrenaline; they therefore decrease the contraction and speed of the heart: used in the treatment of high blood pressure and angina pectoris

---

beta-blocker Scientific  

/ bā′tə-blŏk′ər /

1. A drug that blocks the excitatory effects of epinephrine on the cardiovascular system by binding to cell-surface receptors (called beta-receptors). Beta-blockers are used to treat high blood pressure, angina, and certain abnormal heart rhythms.

---

Other Word Forms

• beta-blocking adjective

Etymology

Origin of beta blocker

First recorded in 1975–80

Example Sentences

Blood thinners reduce stroke risk but also heighten bleeding if athletes fall off their bike or while running or skiing; beta blockers, prescribed to slow a racing heart, can reduce performance.

From Science Magazine

The solution, some digital start-ups suggest, is a beta blocker, a type of medication that can slow heart rate and lower blood pressure — masking some of the physical symptoms of anxiety.

From New York Times

He was put on higher doses and, when that did not work, he was administered beta blockers.

From BBC

She has also recently developed type 2 diabetes and is now on beta blockers.

From BBC

Local radio and TV news called, and, armed with more beta blockers, I went on the air to explain myself and amplify my message.

From Seattle Times