hiwa
Forum Senior
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A 68-year old hospitalized patient presents to you with severe congestive heart failure with significant hypotension. You prescribe dopamine (Intropin) over dobutamine (Dobutrex) because:
A. Dopamine, but not dobutamine, increases cardiac output.
B. Dopamine, but not dobutamine, decreases renal blood flow.
C. Dopamine, but not dobutamine, increases total peripheral resistance.
D. Dopamine, but not dobutamine, activates ß1 receptors.
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| oddissy4u
Forum Guru
Topics: 107
Posts: 389
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B.
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| mash
Forum Fanatic
Topics: 147
Posts: 1,326
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C
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| hiwa
Forum Senior
Topics: 15
Posts: 185
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Dopamin stimulate
Dopamine receptor :arrow: renal vasodilatation (low dose)
B1 receptor :arrow: cardiac dose (intermediate dose)
alfa receptor :arrow: vasoconistricting effect (high dose)
Dobutamine stimulate only
BETA- RECEPTOR
:arrow: increase cardiac contractility and peripheral vasodilatation(decrease peripheral vascular resistance)
So it is C
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| Ajazzy
Forum Newbie
Topics: 3
Posts: 13
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You are right Hiwa, although the primary reason dopamine is given is for its renal vaodialatory properties to prevent ischemiac necrosis, but at high dose there is perepheral vasocinstriction, which increases PVR.
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Good luck guys !
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