ATI RN
Cardiovascular System Exam
1. This term refers to a change in the inotropic state of the muscle without a change in myocardial fiber length.
- A. Contractility
- B. Excitability
- C. Refractoriness
- D. Automaticity
Correct answer: A
Rationale: The correct answer is A: Contractility. Contractility specifically refers to the change in the force of contraction of the heart muscle without changing its length. In this scenario, the focus is on the change in the inotropic state of the muscle, which directly relates to contractility. Choice B, Excitability, refers to the ability of a cell to respond to a stimulus, not specifically related to changes in contractile force. Choice C, Refractoriness, pertains to the period during which a cell is unresponsive to a new stimulus. Choice D, Automaticity, refers to the ability of cardiac cells to spontaneously generate electrical impulses.
2. The client is on hydrochlorothiazide and digoxin. What effect can the nurse expect?
- A. Hydrochlorothiazide increases digoxin levels.
- B. Hydrochlorothiazide decreases digoxin levels.
- C. Hydrochlorothiazide decreases potassium, increasing the risk of digoxin toxicity.
- D. Digoxin can increase the effectiveness of hydrochlorothiazide.
Correct answer: C
Rationale: The correct answer is C. Hydrochlorothiazide is a diuretic that can decrease potassium levels, which in turn can increase the risk of digoxin toxicity. Digoxin typically doesn't impact hydrochlorothiazide levels or effectiveness, making choices A, B, and D incorrect. Choice A stating that hydrochlorothiazide increases digoxin levels is inaccurate. Choice B suggesting that hydrochlorothiazide decreases digoxin levels is also incorrect. Choice D, stating that digoxin can increase the effectiveness of hydrochlorothiazide, is not a typical interaction seen between these medications.
3. Child protective services have removed 10-year-old Christopher from his parents' home due to neglect. Christopher reveals to the nurse that he considers the woman next door his 'nice' mom, that he loves school, and gets above-average grades. The strongest explanation of this response is:
- A. Temperament
- B. Genetic factors
- C. Resilience
- D. Paradoxical effects of neglect
Correct answer: C
Rationale: Christopher's positive outlook, strong school performance, and forming a bond with the neighbor indicate resilience. Resilience refers to the ability to adapt and thrive despite facing adversity, such as being removed from his parents' home due to neglect. His ability to maintain a positive attitude and excel in school despite the challenging circumstances highlights his resilience.
4. When caring for a patient with a burn injury, what is the priority intervention?
- A. Monitor the burn area for infection
- B. Administer IV fluids
- C. Debride the burn area
- D. Apply a dry dressing
Correct answer: A
Rationale: The priority intervention when caring for a patient with a burn injury is to monitor the burn area for infection. This is crucial to prevent further complications such as sepsis. While administering IV fluids is important for fluid resuscitation, it is not the top priority compared to preventing infection. Debriding the burn area and applying a dry dressing are necessary interventions for wound care, but ensuring there is no infection takes precedence to avoid sepsis and other serious complications.
5. A patient on a medical-surgical unit administers a hypnotic medication to an older adult client at 2100. The next morning, the client is drowsy and wants to sleep instead of eating breakfast. Which of the following factors should the nurse identify as a possible reason for the client's drowsiness?
- A. Reduced cardiac function
- B. First-pass effect
- C. Reduced hepatic function
- D. Increased gastric motility
Correct answer: C
Rationale: In older adults, reduced hepatic function can lead to prolonged effects of medications metabolized by the liver. This prolonged effect may result in drowsiness the next morning. Adjusting the dosage of the hypnotic medication may be necessary for this client. Choices A, B, and D are incorrect. Reduced cardiac function (Choice A) is not typically associated with drowsiness due to medication effects. The first-pass effect (Choice B) relates to the initial metabolism of a drug in the liver before reaching systemic circulation, which is not directly linked to drowsiness the next morning. Increased gastric motility (Choice D) does not commonly cause drowsiness as described in the scenario.
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