Nokea
As the cardiac-vascular nurse prepares to administer an experimental cardiac drug to a patient who is participating in a research study, the patient states that they no longer want the medication. The nurse advises the patient that:
- A. participation in the study is critical to improving the quality of patient outcomes.
- B. the medication dose has been scheduled for administration.
- C. the primary investigator will speak with the patient about their decision.
- D. they have the right to refuse the medication and to withdraw from the study.
Correct Answer: D
Rationale: Patients have the right to refuse treatment or withdraw from a study at any time.
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Which surgical procedure involves grafting a blood vessel to bypass a blocked artery in the heart?
- A. Coronary artery bypass graft (CABG)
- B. Valve replacement
- C. Stent placement
- D. Angioplasty
Correct Answer: A
Rationale: The correct answer is A: Coronary artery bypass graft (CABG). This procedure involves grafting a blood vessel to bypass a blocked artery in the heart, improving blood flow. Valve replacement (B) is not a procedure for bypassing blocked arteries. Stent placement (C) involves inserting a mesh tube to keep the artery open but does not involve grafting a blood vessel. Angioplasty (D) is a procedure to widen blocked arteries using a balloon, not grafting a blood vessel. Therefore, the correct choice is CABG.
Which of the following nursing interventions should a nurse perform when caring for a client with congestive heart failure who has decreased cardiac output?
- A. Encourage activities that engage the Valsalva maneuver.
- B. Encourage the client to perform exercises.
- C. Assess apical heart rate before administering digitalis.
- D. Offer small, frequent feedings.
Correct Answer: C
Rationale: Digitalis therapy requires careful monitoring of heart rate to prevent toxicity and worsening cardiac output.
What does the PR interval measure?
- A. Time it takes for the electrical impulse to travel from the atria to the ventricles
- B. Measurement of ventricular depolarization
- C. Duration of ventricular repolarization
- D. Segment representing the time between ventricular depolarization and repolarization
Correct Answer: A
Rationale: The PR interval measures the time it takes for the electrical signal to travel from the atria to the ventricles, reflecting atrial depolarization and the delay at the AV node before ventricular activation. Option A is correct as it accurately describes the PR interval. Option B is incorrect as the PR interval does not measure ventricular depolarization. Option C is incorrect as the PR interval does not represent ventricular repolarization. Option D is incorrect as it describes the QT interval, not the PR interval.
Which measure would be most useful in evaluating a client's compensation in chronic congestive heart failure?
- A. Weekly digoxin blood level assessment
- B. Daily weight assessment
- C. Hourly urinary output
- D. Monthly activity level assessment
Correct Answer: B
Rationale: Daily weight reflects fluid status.
In cases of myocardial infarction leading to shock, which medication is appropriate to counteract shock?
- A. Atropine
- B. Dopamine
- C. Digoxin
- D. Adenosine
Correct Answer: B
Rationale: The correct answer is B: Dopamine. In myocardial infarction leading to shock, dopamine is appropriate due to its positive inotropic effects, increasing cardiac output and blood pressure. Atropine is not indicated for shock in this context. Digoxin may be contraindicated in acute myocardial infarction. Adenosine is not used in managing shock.