The client is taking niacin for cholesterol reduction. What common adverse reaction should the nurse warn the client about?

Correct Answer: D

Rationale: The correct answer is D: Facial flushing. Niacin commonly causes vasodilation, leading to facial flushing. This is a well-known adverse reaction that can be distressing to clients. Dizziness (A), urinary retention (B), and constipation (C) are not typically associated with niacin use. It is important for the nurse to educate the client about this side effect to help manage expectations and promote adherence to the treatment plan.

Correct Answer: C

Rationale: The correct answer is C: The P wave is absent. In atrial fibrillation, the atria are quivering and not contracting effectively, leading to the absence of distinct P waves on the ECG. This is due to the chaotic electrical activity in the atria. Rationale: A: The P wave does not precede a long PR interval in atrial fibrillation. Instead, the irregular electrical signals cause variable PR intervals. B: The P wave falling on the previous T wave is not a characteristic of atrial fibrillation. The T wave represents ventricular repolarization, whereas the P wave reflects atrial depolarization. D: The P wave being peaked is not relevant to atrial fibrillation. In this arrhythmia, the absence of distinct P waves is a key feature due to the erratic atrial activity.

Correct Answer: B

Rationale: The correct answer is B. During an exercise echocardiogram, the client will indeed run on a treadmill to stress the heart and then have an echocardiogram while the heart is still elevated. This allows healthcare providers to assess the heart's function under stress. Choice A is incorrect as the client needs to be active during the test. Choice C is incorrect as lying on the right side is not a standard position for this procedure. Choice D is incorrect because electrocardiographic monitoring is typically used during this test to track the heart's electrical activity.

Correct Answer: D

Rationale: The correct answer is D because monitoring the patient's ability to participate in daily activities without chest pain is a direct assessment of the effectiveness of Nadolol in managing chronic stable angina and left ventricular dysfunction. If the patient can engage in activities without experiencing chest pain, it indicates that the drug is effectively controlling angina symptoms. Option A is incorrect because Nadolol may not significantly decrease blood pressure and heart rate in this context. Option B is incorrect as cold hands and feet are not specific indicators of Nadolol's effectiveness for angina. Option C is also incorrect as improvement in distal pulses may not directly correlate with the drug's efficacy in managing angina symptoms.

Correct Answer: B

Rationale: The correct answer is B because incisions in the leg are not made for harvesting the internal mammary artery in CABG surgery; instead, the internal mammary artery is typically accessed through a small incision in the chest. This shows a misunderstanding of the surgical procedure. A, C, and D are incorrect: A: Correct, as it shows understanding that a heart-lung machine will circulate blood during surgery. C: Correct, as it demonstrates knowledge of using an artery near the heart for bypass. D: Correct, as it indicates awareness of postoperative medication regimen.