ATI RN
Cardiovascular System Quiz Questions Questions
Question 1 of 5
Which of the following is not important in preventing backflow of blood?
Correct Answer: D
Rationale: Chordae tendineae (A), papillary muscles (B), and AV valves (C) prevent backflow in ventricles. Endocardium (D) lines the heart but doesn’t prevent backflow.
Question 2 of 5
The nurse is caring for a client with hypertension. Which of the following drugs should the nurse administer?
Correct Answer: B
Rationale: Dyazide (B), a diuretic combo, treats hypertension by reducing blood volume. Mexiletine (A) is an antiarrhythmic, digoxin (C) treats heart failure, warfarin (D) is an anticoagulant.
Question 3 of 5
The nurse should monitor a client with an acute myocardial infarction who is receiving intravenous streptokinase (Streptase) for which of the following serious adverse reactions?
Correct Answer: A
Rationale: Streptokinase (A), a thrombolytic, risks intracranial hemorrhage, a life-threatening complication. Nausea (B), MI extension (C), and embolus (D) are less directly related.
Question 4 of 5
Approximately what percentage of carbon dioxide is found in expired air?
Correct Answer: C
Rationale: Expired air contains about 4-5% carbon dioxide, significantly higher than the 0.04% in atmospheric air, due to CO₂ exhalation from metabolism. 20% and 40% are too high, reflecting oxygen or total gas misconceptions.
Question 5 of 5
In a client with mitral regurgitation the nurse would expect to see which of the following signs and symptoms?
Correct Answer: C
Rationale: Mitral regurgitation causes blood to flow back into the left atrium, leading to pulmonary congestion and exertional dyspnea (shortness of breath with activity). Crushing chest pain is more typical of myocardial infarction, and elevated WBC suggests infection, not regurgitation directly.