Echocardiography, also known as echo test or heart ultrasound is a noninvasive painless test that uses ultrasound to visualize the shape, size, and movement of the structures of the heart.

Adrenergic Agonists (Sympathomimetics)

Adrenergic agonists are autonomic nervous system drugs that stimulate the adrenergic receptors of the sympathetic nervous system (SNS), either directly (by reacting with receptor sites) or indirectly (by increasing norepinephrine levels). An adrenergic agonist is also called a sympathomimetic because it stimulates the effects of SNS.