The nurse is attempting to increase contractility to improve cardiac output in a patient with acute exacerbation of heart failure. Which of the following measures would be helpful to improve cardiac contractility?
1. Correcting oxygenation and mild respiratory acidosis
2. Encouraging the patient to exercise
3. Administering magnesium sulfate
4. Giving the patient a beta-adrenergic blocking medication
Correcting oxygenation and mild respiratory acidosis
Rationale: Achieving normal oxygenation and correcting acidosis will improve cardiac contractility. Encouraging exercise in a patient with acute exacerbation of heart failure is an unsafe intervention. Both magnesium (a smooth muscle relaxant) and beta-adrenergic blocking medication would decrease cardiac contractility.
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