Dopamine does what?

Dopamine does what?

• A. Treats hypotension due to bradycardia
• B. Treats tachycardia
• C. Treats hypertension
• D. No effect on blood pressure

Answer: (A)

Dopamine is used to support blood pressure in shock, with effects that depend on the dose. For hypotension caused by bradycardia, its beta-1 stimulation increases heart rate and myocardial contractility, which raises cardiac output and lifts blood pressure. At typical therapeutic levels, dopamine also has an alpha-adrenergic effect at higher doses that further increases vascular tone, helping to stabilize mean arterial pressure. While low doses can improve renal perfusion, the key benefit in bradycardic hypotension is the rise in heart rate and contractility that boosts overall blood pressure. So this option best fits because it directly targets the low BP seen with bradycardia by improving cardiac performance, whereas the other statements don’t align with how dopamine works: it can elevate blood pressure rather than have no effect, it’s not primarily used to treat tachycardia, and while it can influence BP, its main role isn’t to treat hypertension.

Dopamine is used to support blood pressure in shock, with effects that depend on the dose. For hypotension caused by bradycardia, its beta-1 stimulation increases heart rate and myocardial contractility, which raises cardiac output and lifts blood pressure. At typical therapeutic levels, dopamine also has an alpha-adrenergic effect at higher doses that further increases vascular tone, helping to stabilize mean arterial pressure. While low doses can improve renal perfusion, the key benefit in bradycardic hypotension is the rise in heart rate and contractility that boosts overall blood pressure.

So this option best fits because it directly targets the low BP seen with bradycardia by improving cardiac performance, whereas the other statements don’t align with how dopamine works: it can elevate blood pressure rather than have no effect, it’s not primarily used to treat tachycardia, and while it can influence BP, its main role isn’t to treat hypertension.