Dobutamine is best described as which of the following?

Dobutamine is best described as which of the following?

• A. Natural catecholamine
• B. Synthetic catecholamine
• C. Peptide hormone
• D. Mineralocorticoid

Answer: (B)

Dobutamine is a synthetic catecholamine. It is designed to act directly on adrenergic receptors, with a strong preference for beta-1 receptors in the heart. This beta-1 stimulation increases the force of cardiac contraction (inotropy) and stroke volume, raising cardiac output. Because its action is mainly on beta-1 with only minimal alpha-adrenergic activity, it tends to produce inotropy with little vasoconstriction and can even cause mild vasodilation, which can lower afterload. It’s not a natural hormone produced by the body, nor is it a peptide hormone or a mineralocorticoid. Clinically, dobutamine is used intravenously for short-term support in heart failure or cardiogenic shock to improve perfusion, with attention to potential tachycardia or arrhythmias.

Dobutamine is a synthetic catecholamine. It is designed to act directly on adrenergic receptors, with a strong preference for beta-1 receptors in the heart. This beta-1 stimulation increases the force of cardiac contraction (inotropy) and stroke volume, raising cardiac output. Because its action is mainly on beta-1 with only minimal alpha-adrenergic activity, it tends to produce inotropy with little vasoconstriction and can even cause mild vasodilation, which can lower afterload. It’s not a natural hormone produced by the body, nor is it a peptide hormone or a mineralocorticoid. Clinically, dobutamine is used intravenously for short-term support in heart failure or cardiogenic shock to improve perfusion, with attention to potential tachycardia or arrhythmias.