ATI RN
Cardiovascular System Exam
1. The nurse is caring for a client on digoxin with a heart rate of 48 bpm. What is the nurse’s priority action?
- A. Hold the digoxin and notify the healthcare provider.
- B. Administer the digoxin as ordered.
- C. Administer atropine to increase the heart rate.
- D. Increase the dose of digoxin.
Correct answer: A
Rationale: In this scenario, the nurse's priority action should be to hold the digoxin and notify the healthcare provider. A heart rate of 48 bpm is low, and digoxin, being a medication that can further decrease the heart rate, should be withheld. Administering the digoxin as ordered (Choice B) would not be appropriate in this situation as it can exacerbate bradycardia. Atropine (Choice C) is not the initial treatment for this scenario; holding the digoxin is the first action. Increasing the dose of digoxin (Choice D) would be contraindicated due to the client's bradycardia. Therefore, the correct action is to hold the digoxin and inform the healthcare provider for further guidance.
2. What is a condition where the heart is unable to pump blood effectively, leading to a buildup of fluid in the lungs and other parts of the body?
- A. Heart failure
- B. Cardiomyopathy
- C. Myocardial infarction
- D. Pulmonary edema
Correct answer: A
Rationale: The correct answer is A: Heart failure. Heart failure occurs when the heart is unable to pump blood effectively, resulting in a buildup of fluid in the lungs and other parts of the body. Choice B, Cardiomyopathy, refers to diseases of the heart muscle, not specifically the inability to pump blood effectively. Choice C, Myocardial infarction, is a heart attack caused by a blocked blood supply to the heart muscle, not directly related to the heart's pumping efficiency. Choice D, Pulmonary edema, is a condition characterized by fluid accumulation in the lungs, often a consequence of heart failure but not the primary condition described in the question.
3. What is a condition characterized by the presence of air or gas in the pleural space, leading to the collapse of the lung?
- A. Pneumothorax
- B. Pulmonary embolism
- C. Pleural effusion
- D. Atelectasis
Correct answer: A
Rationale: The correct answer is Pneumothorax. Pneumothorax occurs when air or gas accumulates in the pleural space, causing the lung to collapse. This condition can result in symptoms such as chest pain and difficulty breathing. Pulmonary embolism (choice B) is a blockage in one of the pulmonary arteries in the lungs, usually caused by a blood clot. Pleural effusion (choice C) is the accumulation of excess fluid in the pleural space, not air or gas. Atelectasis (choice D) refers to the collapse or closure of a lung resulting in reduced or absent gas exchange.
4. The client is given an alpha agonist. What might it be used for?
- A. For hemostasis
- B. To dilate the arteries
- C. To dilate the veins
- D. To decrease afterload
Correct answer: A
Rationale: Alpha agonists are used for hemostasis to help control bleeding by constricting blood vessels, leading to decreased blood flow to the area. Choices B, C, and D are incorrect as alpha agonists do not typically dilate arteries, dilate veins, or decrease afterload.
5. Which term refers to the ability of the heart to initiate impulses repetitively and spontaneously?
- A. Contractility
- B. Excitability
- C. Automaticity
- D. Rhythmicity
Correct answer: C
Rationale: The correct answer is C: Automaticity. Automaticity is the specific term used to describe the heart's ability to generate impulses repetitively and spontaneously. Contractility (A) refers to the ability of muscle fibers to contract, not the initiation of impulses. Excitability (B) is the ability of cells to respond to stimuli but is not specific to the heart's impulse generation. Rhythmicity (D) is a related term but does not specifically describe the heart's spontaneous impulse initiation.
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