Beta blockers are a class of drugs that are particularly used for the management of cardiac arrhythmias, protecting the heart from a second heart attack (myocardial infarction) after a first heart attack (secondary prevention), and hypertension. It is also known as β-blockers, beta-adrenergic blocking agents, beta antagonists, beta-adrenergic antagonists, beta-adrenoreceptor antagonists, or beta adrenergic receptor antagonists.
Beta blockers block the action of endogenous catecholamines epinephrine (adrenaline) and norepinephrine (noradrenaline) -in particular on adrenergic beta receptors, of the sympathetic nervous system, which mediates the fight-or-flight response. Some block all activation of β-adrenergic receptors and others are selective.
Contraindications of Beta Blockers [ Mnemonic ]
[ ABCDE ]
Asthma
Block (heart block)
COPD
Diabetes mellitus
Electrolyte (hyperkalemia)
Beta blockers block the action of endogenous catecholamines epinephrine (adrenaline) and norepinephrine (noradrenaline) -in particular on adrenergic beta receptors, of the sympathetic nervous system, which mediates the fight-or-flight response. Some block all activation of β-adrenergic receptors and others are selective.
Contraindications of Beta Blockers [ Mnemonic ]
[ ABCDE ]
Asthma
Block (heart block)
COPD
Diabetes mellitus
Electrolyte (hyperkalemia)
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