The client has a sudden increase in heart rate and cardiac contractility. What part of the client’s body is likely activated?

Correct Answer: D

Rationale: The correct answer is D: The sympathetic nervous system. When the client experiences a sudden increase in heart rate and contractility, the sympathetic nervous system is likely activated. This is because the sympathetic nervous system is responsible for the "fight or flight" response, which increases heart rate and contractility to prepare the body for action. The other choices are incorrect because: A: The parasympathetic nervous system would have the opposite effect, slowing down heart rate and contractility. B: The AV node is a part of the heart's electrical conduction system, not directly involved in increasing heart rate and contractility. C: Baroreceptors in the carotid sinus are responsible for regulating blood pressure, not directly influencing heart rate and contractility.

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.

Correct Answer: A

Rationale: The correct answer is A: Attach the heart monitor. This should be done first to continuously monitor the patient's heart rhythm and detect any arrhythmias or changes. Monitoring the heart is crucial in NSTEMI cases to identify any potential complications. Obtaining the blood pressure (Choice B) is important but not as urgent as monitoring the heart. Assessing peripheral pulses (Choice C) and auscultating breath sounds (Choice D) are also important assessments but do not take precedence over monitoring the heart in a NSTEMI patient.