ATI RN
Cardiovascular System Exam Questions
1. What type of medication is used to relax the muscles around the airways and improve breathing in conditions like asthma and COPD?
- A. Bronchodilator
- B. Corticosteroid
- C. Mucolytic
- D. Antihistamine
Correct answer: A
Rationale: Bronchodilators are medications that relax the muscles around the airways, improving airflow and making breathing easier for patients with asthma or COPD. Corticosteroids are anti-inflammatory drugs used to reduce airway inflammation, while mucolytics help in thinning and clearing mucus. Antihistamines are used to treat allergies and not specifically to improve breathing in conditions like asthma or COPD.
2. The client is receiving intravenous dopamine. What is the most important nursing assessment?
- A. Monitor heart rate and rhythm
- B. Monitor blood pressure
- C. Monitor respiratory rate
- D. Monitor oxygen saturation
Correct answer: A
Rationale: The correct answer is to monitor heart rate and rhythm when a client is receiving intravenous dopamine. Dopamine is known to potentially cause arrhythmias, making this assessment crucial. While monitoring blood pressure, respiratory rate, and oxygen saturation are important nursing assessments, they are not the most critical when dopamine is being administered.
3. Which valve opens during ventricular systole and closes during ventricular diastole?
- A. Aortic valve
- B. Pulmonary valve
- C. Mitral valve
- D. Tricuspid valve
Correct answer: B
Rationale: The correct answer is B: Pulmonary valve. The pulmonary valve opens during ventricular systole to allow blood to flow from the right ventricle into the pulmonary artery. The aortic valve opens during ventricular systole to allow blood to flow from the left ventricle into the aorta. The mitral valve and tricuspid valve are atrioventricular valves that open during ventricular diastole to allow blood to flow from the atria into the ventricles.
4. The client is receiving digoxin and has a potassium level of 2.8 mEq/L. What is the nurse’s priority action?
- A. Hold the digoxin and notify the healthcare provider.
- B. Increase the dose of digoxin.
- C. Continue the current dose of digoxin.
- D. Administer potassium supplements.
Correct answer: A
Rationale: The correct answer is to hold the digoxin and notify the healthcare provider. A potassium level of 2.8 mEq/L indicates hypokalemia, which can increase the risk of digoxin toxicity. Holding the medication and informing the healthcare provider is crucial to prevent adverse effects. Choice B is incorrect because increasing the dose of digoxin would further raise the risk of toxicity. Choice C is incorrect as continuing the current dose could exacerbate the toxicity risk. Choice D is incorrect because administering potassium supplements alone is not sufficient to address the potential digoxin toxicity; the first step should be to hold the digoxin and seek further guidance.
5. Which order should the nurse question?
- A. The addition of a loop diuretic with digoxin.
- B. The addition of a beta blocker with digoxin.
- C. A digoxin dose of 0.125 mg per day.
- D. The addition of an ACE inhibitor with digoxin.
Correct answer: B
Rationale: The correct answer is B because adding a beta blocker to digoxin can potentiate the bradycardic effect of digoxin, leading to serious complications such as heart block. This combination requires caution as it can significantly slow down the heart rate. Choices A, C, and D are not the best options to question in this scenario. Loop diuretics are commonly used with digoxin, a digoxin dose of 0.125 mg per day is within the typical range, and ACE inhibitors are often prescribed alongside digoxin for managing heart conditions.
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