3. Vasopressors Flashcards
1
Q
Define vasopressors.
A
pharmacologic agent used to increase blood pressure
2
Q
Which agents work on α and β receptors?
A
- epinephrine
- norepinephrine
- dopamine
- phenylephrine
3
Q
What agents act on the V1 receptor?
A
Vasopressin
4
Q
What is the difference between vasopressors and inotropes?
A
- vasopressors: ↑ BP; target MAP
- inotropes: ↑ contractility; target CO
5
Q
What does activation of the α1 receptor cause?
A
vasoconstriction in the peripheral tissue
6
Q
What does activation of the α₂ receptor cause?
A
- inhibits NE release
- prevents vasoconstriction
7
Q
What does activation of the β1 receptor cause?
A
increases heart rate and cardiac contractility
8
Q
What does activation of the β₂ receptor cause?
A
- bronchodilation
- increases glucagon release
9
Q
What receptors does dopamine agonize?
A
- DA
- β1
- α1
10
Q
What are the effects of dopamine?
A
increases SV and HR
