ATI RN
NCLEX Practice Questions Cardiovascular System Questions
Question 1 of 5
Which of the following lists the valves in the order through which the blood flows from the vena cava through the heart?
Correct Answer: A
Rationale: Blood flows: vena cava → right atrium → tricuspid (A) → right ventricle → pulmonary semilunar → lungs → left atrium → bicuspid (mitral) → left ventricle → aortic semilunar.
Question 2 of 5
The nurse is caring for a client with atrial fibrillation who is being treated with a variety of drugs. The nurse administers which of the following drugs in combination with quinidine that may result in an increased level of the drug?
Correct Answer: B
Rationale: Quinidine with digoxin (B) can double digoxin levels due to reduced clearance, risking toxicity. Others (A, C, D) don’t have this interaction.
Question 3 of 5
The nurse is developing a medication schedule for a client receiving simvastatin (Zocor). To promote maximal effectiveness, the nurse should administer the drug
Correct Answer: C
Rationale: Simvastatin (C) is most effective at bedtime when cholesterol synthesis peaks. Meal timing (A, B) or morning (D) is less optimal.
Question 4 of 5
Which type of blood cell is involved in the clotting mechanism of blood?
Correct Answer: D
Rationale: Platelets (thrombocytes) are critical for blood clotting, aggregating at injury sites and releasing clotting factors. Neutrophils and eosinophils fight infection, and lymphocytes are immune cells, not directly involved in clotting.
Question 5 of 5
A client with atrial fibrillation is receiving digoxin (Lanoxin). It is MOST important for the nurse to?
Correct Answer: A
Rationale: Digoxin slows heart rate in atrial fibrillation; measuring the apical pulse before administration ensures it’s not below 60 bpm, preventing bradycardia toxicity. Other actions are useful but secondary to this safety priority.