Dopamine Receptor Agents Flashcards
What is the typical onset of action for intravenous dopamine?
1–4 minutes
Which dopamine dose range primarily causes renal vasodilation via dopaminergic receptors?
Low doses 0.5-3mcg/kg/min
At doses above 10 mcg/kg/min, dopamine acts predominantly on which receptors?
Alpha-1 receptors
Which of the following is a common side effect of dopamine therapy?
Hypertension
Dopamine is most appropriately used in which of the following clinical scenarios?
Septic shock with renal hypoperfusion
Does Dopamine have dose-dependent effects on different receptors?
Yes
Does Low-dose dopamine (0.5-3mcg/kg/min) increase cardiac output via beta-1 stimulation?
No
Is Dopamine a first-line agent for hypotension due to hypovolemia?
No
Are Tachyarrhythmias a possible side effect of dopamine infusion?
Yes
Can Dopamine’s effects last for 1–2 hours after discontinuation?
No
What receptors does dopamine primarily stimulate at low (renal), moderate (cardiac), and high (vasopressor) doses?
D1, beta-1, alpha-1
What is the typical dose range of dopamine for cardiac stimulation (inotropic effect)?
3-10mcg/kg/min
What is the duration of action of dopamine after IV infusion is stopped?
Less than 10 minutes
List two clinical effects of dopamine at moderate doses (5–10 mcg/kg/min).
- Increased heart rate
- Myocardial contractility
What are two potential adverse effects of dopamine at higher doses?
- Tachycardia
- Hypertension
In what situations is dopamine commonly used in the clinical setting?
Management of shock with low cardiac output and hypotension
