Correct Answer: C

Rationale: The correct answer is C: Hypokalemia. Furosemide, a loop diuretic, commonly causes potassium loss, leading to hypokalemia. The nurse should closely monitor for decreased potassium levels in a client receiving furosemide to prevent complications such as cardiac arrhythmias or muscle weakness. Hyperkalemia (Choice A) is not typically associated with furosemide use. Hypernatremia (Choice B) refers to high sodium levels and is not the primary concern with furosemide. Hyponatremia (Choice D) is low sodium levels, which can occur but is less common than hypokalemia in clients taking furosemide.

Correct Answer: C

Rationale: Atenolol is a beta-blocker that works by lowering blood pressure. A common side effect of atenolol is hypotension, where blood pressure drops too low. Therefore, the nurse should monitor the client for signs and symptoms of hypotension to prevent any complications. Choices A, B, and D are incorrect because tachycardia (fast heart rate), dry mouth, and increased appetite are not common side effects of atenolol. Hypotension is the expected side effect due to the medication's mechanism of action.

Correct Answer: A

Rationale: The correct instruction for discharge teaching regarding digoxin (Lanoxin) is to advise the client to take their pulse before each dose and to hold the medication if their pulse is below 60 beats per minute. Digoxin can cause bradycardia, so monitoring the pulse is crucial to prevent potential complications. Choice B is incorrect because excessive fluid intake can lead to fluid overload, worsening heart failure. Choice C is not directly related to digoxin therapy. Choice D is inaccurate as digoxin is usually taken on an empty stomach to facilitate absorption.

Correct Answer: B

Rationale: The correct method for administering sublingual nitroglycerin is to place the tablet under the tongue and allow it to dissolve. This route of administration facilitates rapid absorption of the medication into the bloodstream, enabling quick relief of chest pain associated with angina or heart conditions. Choice A is incorrect because sublingual nitroglycerin should not be swallowed whole. Choice C is wrong as chewing the tablet can lead to the rapid release of the drug, causing adverse effects like headaches or dizziness. Choice D is also incorrect as the tablet should not be placed between the cheek and gum, but under the tongue for proper absorption.

Correct Answer: A

Rationale: The nurse's priority intervention for a client with coronary artery disease (CAD) experiencing dyspnea at rest is to elevate the head of the bed. Elevating the head of the bed helps improve lung expansion and reduces the workload on the heart, aiding in respiratory effort and cardiac function. This intervention is crucial in enhancing oxygenation and optimizing cardiac output in individuals with CAD presenting with dyspnea. Administering oxygen (Choice B) is important but elevating the head of the bed takes precedence as it directly addresses the client's respiratory distress. Continuous ECG monitoring (Choice C) and applying a nasal cannula (Choice D) are relevant interventions but not the priority when a client with CAD reports dyspnea at rest.