ATI RN
Cardiovascular System Exam Questions And Answers
1. Which heart chamber ejects blood into the lungs via the pulmonary artery?
- A. Right atrium
- B. Left atrium
- C. Right ventricle
- D. Left ventricle
Correct answer: C
Rationale: The correct answer is C, the right ventricle. The right ventricle is responsible for pumping deoxygenated blood into the lungs through the pulmonary artery for oxygenation. Choices A, B, and D are incorrect because the right atrium receives deoxygenated blood from the body, the left atrium receives oxygenated blood from the lungs, and the left ventricle pumps oxygenated blood to the body, respectively.
2. The triage nurse notes upon assessment in the emergency room that the patient with anxiety is hyperventilating. The nurse is aware that hyperventilation is the most common cause of which acid-base imbalance?
- A. Respiratory acidosis
- B. Respiratory alkalosis
- C. Metabolic acidosis
- D. Metabolic alkalosis
Correct answer: B
Rationale: The correct answer is B: Respiratory alkalosis. Hyperventilation is the most common cause of acute respiratory alkalosis. When a patient hyperventilates due to anxiety or other causes, they blow off excessive carbon dioxide, leading to a decrease in PaCO2 and a rise in pH. Choices A, C, and D are incorrect because hyperventilation leads to a decrease in PaCO2, causing respiratory alkalosis, not respiratory acidosis, metabolic acidosis, or metabolic alkalosis.
3. During a synchronized cardioversion on a client in atrial fibrillation, when the machine is activated and there is a pause, what action should the nurse take?
- A. Wait until the machine discharges
- B. Shout “all clear” and don’t touch the bed
- C. Make sure the client is all right
- D. Increase the joules and re-discharge
Correct answer: B
Rationale: The correct action for the nurse to take when there is a pause after activating the machine for synchronized cardioversion on a client in atrial fibrillation is to shout “all clear” and not touch the bed. This step is crucial to ensure the safety of everyone present by warning them that the machine will discharge, preventing anyone from being inadvertently shocked. Waiting for the machine to discharge (choice A) is not recommended as it can lead to accidental injury. While ensuring the client is all right (choice C) is important, the immediate focus should be on safety during the procedure. Increasing the joules and re-discharging (choice D) without assessing the situation can pose risks to the client and the healthcare team.
4. Your patient has a retractable gastric peptic ulcer and has had a gastric vagotomy. Which factor increases as a result of vagotomy?
- A. Peristalsis.
- B. Gastric acidity.
- C. Gastric motility.
- D. Gastric pH.
Correct answer: D
Rationale: After a gastric vagotomy, the gastric pH increases as a result of reduced acid secretion.
5. When administering the drug lithium, what is one important side effect to watch for?
- A. Anaphylaxis
- B. Seizures
- C. Angioedema
- D. Pulmonary Edema
Correct answer: C
Rationale: When administering lithium, it is crucial to watch for the side effect of angioedema. Angioedema is a potential adverse reaction associated with lithium therapy, characterized by rapid swelling beneath the skin, often around the eyes and lips. Monitoring for this side effect is essential to promptly address and manage any signs of angioedema that may occur during lithium treatment. Choices A, B, and D are incorrect because anaphylaxis, seizures, and pulmonary edema are not typically associated side effects of lithium administration.
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