beta-blocking agent

[Wallacejed]

any of various drugs used in treating hypertension or arrhythmia; decreases force and rate of heart contractions by blocking beta-adrenergic receptors of the autonomic nervous system

[Welington Mina]

A beta-blocking agent, also known as a beta-blocker, is a type of medication that is primarily used to manage abnormal heart rhythms, and to protect the heart from a second heart attack after a first one has occurred. Beta-blockers work by blocking the effects of the hormone adrenaline, also known as epinephrine. They do this by preventing adrenaline from binding to beta receptors on the nerves. By blocking the effects of adrenaline, they reduce the heart rate, reduce blood pressure by dilating blood vessels, and reduce the force of the hearts contractions, thus reducing the demand for oxygen and helping the heart to function more efficiently.