Intravenous epinephrine (adrenaline) causes alpha-adrenergic effects.
Epinephrine is a hormone produced by adrenal gland in body. It is a 3F hormone where 3F refers to fight, fright and flight. Administration of the hormone causes the same effects as done by the hormone. These effects are aimed at Sympathetic Nervous System and include contraction of smooth muscles of blood vessels subsequently increasing blood pressure, increase in heart rate and pupil size, accompanied with increase in breathing rate and blood supply.
Cardiac arrest refers to sudden loss of heart function, pumping of blood, which causes deprivation of oxygen in organs including brain. As the mentioned definition of cardiac arrest states stoppage of blood flow, the effects of epinephrine are beneficial in the condition of cardiac arrest.
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