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NCLEX Cardiovascular Questions Quizlet Questions
Question 1 of 5
In the cardiac cycle, the R wave is recorded on an ECG during:
Correct Answer: A
Rationale: The R wave corresponds to ventricular depolarization and contraction.
Question 2 of 5
A patient with heart failure has a new order for captopril 12.5 mg PO. After giving the first dose and teaching the patient about the drug, which statement by the patient indicates that teaching has been effective?
Correct Answer: C
Rationale: Captopril can cause hypotension, especially after the initial dose, so it is important that the patient not get up out of bed without assistance until the nurse has had a chance to evaluate the effect of the first dose. The angiotensin-converting enzyme (ACE) inhibitors are potassium sparing, and the nurse should not teach the patient to purposely increase sources of dietary potassium. Increased shortness of breath is expected with the initiation of β-adrenergic blocker therapy for heart failure, not for ACE inhibitor therapy. ACE inhibitors are best absorbed when taken an hour before eating.
Question 3 of 5
The rate of blood flow to the 'entire body' increases significantly during exercise. Explain briefly how the heart achieves this.
Correct Answer: D
Rationale: The heart boosts output through combined increases in rate and stroke volume.
Question 4 of 5
Purkinje fibers are found in:
Correct Answer: A
Rationale: Purkinje fibers, part of the conduction system, are located in the endocardium of the heart.
Question 5 of 5
Which of the following heart murmurs is heard during systole?
Correct Answer: D
Rationale: Patent ductus arteriosus causes a continuous murmur, but it's loudest in systole, fitting the systolic category.