RN Nursing · Vasoactive Medications · Practice question
A nurse is caring for a client who is in cardiogenic shock following a myocardial infarction. The nurse should anticipate which of the following prescriptions?
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✓
Dobutamine
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Mannitol
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Alteplase
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Propofol
Answer & explanation
Correct: Dobutamine
Cardiogenic shock occurs when the heart cannot pump enough blood to meet the body's metabolic demands, typically following a large myocardial infarction. Dobutamine is a beta-1 adrenergic agonist with positive inotropic effects that increases myocardial contractility and cardiac output without significantly raising heart rate at lower doses. It is a cornerstone vasopressor/inotrope in cardiogenic shock management. Mannitol is an osmotic diuretic used to reduce intracranial pressure or treat acute kidney injury; it would be harmful in cardiogenic shock by potentially reducing preload in an already volume-sensitive state. Alteplase is a thrombolytic agent used in ischemic stroke or massive pulmonary embolism; while it may be used in ST-elevation MI to reopen a coronary artery, it is not the treatment for the hemodynamic instability of established cardiogenic shock. Propofol is a sedative-anesthetic used for procedural sedation or mechanical ventilation; it has vasodilatory properties that could worsen hypotension in cardiogenic shock. Dobutamine directly addresses the primary problem of inadequate cardiac output and is the appropriate anticipated prescription.
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