ATI LPN
NCLEX Cardiovascular Questions Quizlet Questions
Question 1 of 5
Which of the following is not an atrioventricular valve?
Correct Answer: A
Rationale: The aortic valve is a semilunar valve, not an AV valve like mitral, bicuspid, or tricuspid.
Question 2 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 3 of 5
Which of the following statements is true regarding heart rate regulation?
Correct Answer: A
Rationale: The vagus nerve (parasympathetic) releases acetylcholine to slow the heart rate. Cardiac nerves (sympathetic) increase heart rate, and acetylcholine does not increase it, making only A true.
Question 4 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 5 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.