Final answer:
In the case of decompensated heart failure, Metoprolol, a β-blocker, would likely be prescribed by the nurse, as it slows down the heart rate and decreases the force of contraction, which can be beneficial for conserving heart energy and function.
Step-by-step explanation:
A client with the diagnosis of decompensated heart failure would most likely be treated with medications that aim to improve cardiac function and reduce the workload on the heart. Among the options provided, Metoprolol is a β-blocker that is commonly used in the management of heart failure. It works by blocking the β1-receptors which reduce heart rate and the force of contraction, thus conserving energy and improving the efficiency of the heart. In the context of decompensated heart failure, this can help to prevent further deterioration of the cardiac function.
Cardizem (a type of calcium channel blocker) and Celecoxib (a nonsteroidal anti-inflammatory drug) are not typically first-line treatments for decompensated heart failure. Dobutamine is a sympathomimetic drug that can be used in acute settings to increase cardiac output temporarily but is not a common long-term treatment. Therefore, Metoprolol would be the expected medication prescribed by the nurse for chronic management of decompensated heart failure.