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Questions and Answers
Dopamine, an alpha-beta adrenergic agonist, is used in the treatment of shock primarily for what reason?
Dopamine, an alpha-beta adrenergic agonist, is used in the treatment of shock primarily for what reason?
- To inhibit the release of norepinephrine, thus reducing stress on the heart.
- To directly counteract the effects of pulmonary hypertension.
- To induce tachyarrhythmias to improve cardiac output.
- To dilate vessels in the kidneys, maintaining perfusion, and to stimulate the sympathetic nervous system. (correct)
A patient with which of the following conditions would be contraindicated for dopamine administration?
A patient with which of the following conditions would be contraindicated for dopamine administration?
- Pheochromocytoma (correct)
- Hypovolemia due to blood loss
- Bradycardia
- Hypotension
What is the primary mechanism of action of Isoproterenol?
What is the primary mechanism of action of Isoproterenol?
- Acts on nicotinic receptors to produce increased HR, positive inotropic effect, bronchodilation and vasodilation
- Acts on beta-adrenergic receptors to produce increased HR, positive inotropic effect, bronchodilation, and vasodilation. (correct)
- Acts on alpha-adrenergic receptors to decrease HR, negative inotropic effect and vasoconstriction
- Acts on muscarinic receptors to produce increased HR, positive inotropic effect, bronchodilation and vasodilation
Which of the following is a contraindication for the use of Isoproterenol?
Which of the following is a contraindication for the use of Isoproterenol?
What is the half-life of dopamine?
What is the half-life of dopamine?
A patient is experiencing symptoms of shock. Which assessment finding would lead the nurse to question the administration of dopamine?
A patient is experiencing symptoms of shock. Which assessment finding would lead the nurse to question the administration of dopamine?
A patient receiving Isoproterenol starts to complain of chest pain and shortness of breath. What is the priority nursing intervention?
A patient receiving Isoproterenol starts to complain of chest pain and shortness of breath. What is the priority nursing intervention?
If a patient is concurrently taking an antidepressant, what is a significant concern regarding the administration of dopamine?
If a patient is concurrently taking an antidepressant, what is a significant concern regarding the administration of dopamine?
Which of the following adverse effects is more commonly associated with Isoproterenol than with Dopamine, considering their receptor specificities?
Which of the following adverse effects is more commonly associated with Isoproterenol than with Dopamine, considering their receptor specificities?
Flashcards
Alpha-Beta Adrenergic Agonist
Alpha-Beta Adrenergic Agonist
A drug that stimulates both alpha and beta-adrenergic receptors; used to treat shock by dilating kidney vessels and stimulating the sympathetic nervous system.
Dopamine Indications
Dopamine Indications
Correction of hemodynamic imbalances in shock through vasodilation in the kidneys and stimulation of the sympathetic nervous system.
Dopamine Contraindications
Dopamine Contraindications
Pheochromocytoma, tachyarrhythmias, ventricular fibrillation, hypovolemia, and peripheral vascular disease.
Dopamine Adverse Effects
Dopamine Adverse Effects
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Dopamine Drug Interactions
Dopamine Drug Interactions
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Beta-Specific Adrenergic Agonist
Beta-Specific Adrenergic Agonist
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Isoproterenol Indications
Isoproterenol Indications
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Isoproterenol Contraindications
Isoproterenol Contraindications
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Isoproterenol Adverse Effects
Isoproterenol Adverse Effects
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Study Notes
- Alpha-Beta adrenergic agonists such as Dopamine treat shock
Dopamine
- Acts directly or triggers norepinephrine release.
- Dilates kidney vessels to sustain perfusion while stimulating the sympathetic nervous system.
- Used for correcting hemodynamic imbalances during instances of shock.
- Should not be used with Pheochromocytoma.
- Contraindicated in patients with tachyarrhythmias or ventricular fibrillation.
- Use is cautioned with hypovolemia and peripheral vascular disease.
- Adverse effects include tachycardia, ectopic beats, anginal pain, and dyspnea.
- Administered via IV.
- Has a half-life of 2 minutes.
- Do not use with antidepressants and MAOIs.
Isoproterenol
- Functions as a beta-specific adrenergic agonist which enhances heart pumping.
- Acts on beta-adrenergic receptors, increasing heart rate, providing a positive inotropic effect, causing bronchodilation, and vasodilation.
- Indicated for shock with low cardiac output, cardiac arrest, ventricular arrhythmias, and heart block.
- Contraindicated in patients with pulmonary hypertension and tachyarrhythmias.
- Use is cautioned with diabetes, thyroid disease, heart disease, and stroke.
- Adverse effects include anxiety, fear, cardiac arrhythmias, tachycardia, nausea/vomiting, heartburn, respiratory difficulties, coughing, pulmonary edema, and sweating.
- Administered via IV.
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Description
An overview of Dopamine and Isoproterenol. Dopamine helps correct hemodynamic imbalances during shock by dilating kidney vessels and stimulating the sympathetic nervous system. Isoproterenol increases heart rate, provides inotropic effects, and causes bronchodilation.
