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Adrenergic agonists
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What do adrenergic agonsists do:
stimulate sympathetic nervous system
increase cardiac output
raise blood pressure
increase uring output
constrict blood vessels
Catecholamine info
can not be oral
don't cross blood brain barrier
have short action
3 main adrenergic agonists and what used for
Epinephrine for AV blocks, cardiac arrest & asthma
Dopamine for shock and heart failure
Dobutamine for heart failure
Interactions for adrenergic agonists
avoid using MAOI's
avoid tricyclic depressants
with general anesthesia the heart becomes hypersensitive to epinephrine causing dysrhythmias
alpha adrenergic blockers - blocks receptors
beta blockers - block beta receptors
diuretics - promote beneficial effect of dopamine - monitor for therapeutic effects
Epinephrine uses
vasoconstriction
slows absorption of local anesthetics
manages superficial bleeding
decrease nasal congestion
increse blood pressure
Epinephrine beta 1 actions
increase heart rate
increase myocardial contractility
increase rate of conduction through AV node
Epinephrine beta 2 actions
bronchodilation
Epinephrine adverse effects & nursing actions
can lead to hypertension - monitor heart rate & vitals
can cause dysrhythmias - monitor for dysrhythmias
increased heart rate can increase workload of heart and increase need for oxygen - monitor for chest pain
Dopamine dosing - low dose effects
dilation of renal blood vessels
Dopamine dosing - moderate dose
dilation of renal blood vessels
increase heart reat
increased myocardial contractility
increased AV node conduction rate
Dopamine dosing - high dose
dilation of renal blood vessels
increased heart rate
increased myocardial contractility
increased AV node conduction rate
vasoconstriction
Dopamine side effects & nursing actions
dysrhythmias \\\\\\\\\\\
increased heart workload-------- monitor heart rate, pain, dysrhythmias
increased oxygen need ///////////
necrosis from extravasation from high doses ---- monitor IV site
Dobutamine effects
only affects beta 1 receptors
increased heart rate
increased myocardial contractility
increased AV node conduction
Author
busdriverre
ID
6183
Card Set
Adrenergic agonists
Description
adrenergic agonists for cardio use
Updated
2010-02-07T01:26:44Z
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