ATI RN
Cardiovascular System Exam Questions
1. Where is the impulse from the SA node delayed, enabling atrial contraction to complete before the ventricles are stimulated and contract?
- A. AV node
- B. Bundle of His
- C. SA node
- D. Aorta
Correct answer: A
Rationale: The correct answer is AV node. The AV node is responsible for delaying the impulse from the SA node, allowing the atria to contract before the ventricles. This delay ensures the effective pumping of blood in a coordinated manner. Choices B, C, and D are incorrect because the Bundle of His is responsible for transmitting the impulse to the Purkinje fibers, the SA node is the pacemaker of the heart responsible for initiating the heartbeat, and the aorta is the main artery carrying oxygenated blood from the heart to the body, respectively, none of which are involved in delaying the impulse to allow atrial contraction before ventricular contraction.
2. What is a characteristic of structured interviews?
- A. Do not yield the same depth of information as a clinical interview
- B. Are flexible because questions are phrased differently for each participant
- C. Bring together a wide range of information on one person
- D. Tell researchers little about the reasoning behind participants' responses
Correct answer: A
Rationale: The correct answer is A. Structured interviews do not yield the same depth of information as a clinical interview because they involve a set of standardized questions that are asked in the same way to all participants. This lack of flexibility may limit the depth and richness of the responses obtained compared to a more open-ended clinical interview. Choices B, C, and D are incorrect because structured interviews are not flexible in question phrasing, do not necessarily bring together a wide range of information on one person, and can provide insights into participants' reasoning behind responses depending on the design of the structured questions.
3. What intervention is required when continuous bubbling is seen in the chest tube water seal chamber?
- A. Tighten the connections of the chest tube system
- B. Clamp the chest tube
- C. Replace the chest tube
- D. Continue monitoring the chest tube
Correct answer: A
Rationale: When continuous bubbling is observed in the chest tube water seal chamber, tightening the connections of the chest tube system is the appropriate intervention. This action can often resolve an air leak, which is the common cause of continuous bubbling. Clamping the chest tube or replacing it is not recommended as the first-line intervention because it may lead to complications or unnecessary tube changes. Continuing to monitor the chest tube without addressing the air leak would delay necessary corrective action, potentially causing respiratory compromise in the patient. Therefore, tightening the connections of the chest tube system is the most suitable initial step to manage continuous bubbling in the water seal chamber.
4. During the first six months of lactation, a breastfeeding mother is advised to consume how many extra kcalories per day to meet energy needs?
- A. 250
- B. 330
- C. 400
- D. 470
Correct answer: B
Rationale: A breastfeeding mother is advised to consume an additional 330 kcalories per day during the first six months to support milk production and meet increased energy needs.
5. Which instructions should the nurse discuss with the client diagnosed with Raynaud’s phenomenon?
- A. Explain that exacerbations will not occur in the summer
- B. Use nicotine gum to help quit smoking
- C. Wear extra warm clothing during cold exposure
- D. Avoid prolonged exposure to direct sunlight
Correct answer: C
Rationale: The correct instruction for a client diagnosed with Raynaud’s phenomenon is to wear extra warm clothing during cold exposure. This is essential in preventing vasospasms triggered by cold temperatures, which can worsen symptoms of Raynaud's phenomenon. Choice A is incorrect because exacerbations can occur in any season. Choice B is irrelevant and not directly related to managing Raynaud's phenomenon. Choice D is also incorrect as sunlight exposure does not significantly impact Raynaud's phenomenon.
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