ATI RN
Physical Exam Cardiovascular System
1. What is a condition where the arteries supplying blood to the legs and feet become narrowed or blocked, causing pain and difficulty walking?
- A. Peripheral artery disease
- B. Atherosclerosis
- C. Varicose veins
- D. Raynaud's disease
Correct answer: A
Rationale: The correct answer is A, Peripheral artery disease (PAD). PAD is characterized by the narrowing or blockage of arteries that supply blood to the legs and feet, resulting in pain and difficulty walking. Choice B, Atherosclerosis, is a condition involving the buildup of plaque in the arteries but is not specific to the legs and feet. Varicose veins (Choice C) refer to enlarged, twisted veins usually occurring in the legs. Raynaud's disease (Choice D) involves episodes of reduced blood flow to the extremities, typically triggered by cold temperatures or stress, but it is not directly related to the arteries in the legs and feet.
2. What is the ability of cardiac cells to respond to an impulse by contracting?
- A. Excitability
- B. Contractility
- C. Rhythmicity
- D. Conductivity
Correct answer: A
Rationale: Excitability is the correct term that describes the ability of cardiac cells to respond to an impulse by contracting. Excitability refers to the cell's ability to respond to stimuli and generate an action potential. Choice B, Contractility, is incorrect as it refers to the ability of cardiac cells to contract after receiving a stimulus, not the response to the impulse itself. Choice C, Rhythmicity, is incorrect as it pertains to the heart's ability to contract rhythmically without external stimulation. Choice D, Conductivity, is incorrect as it refers to the ability of cardiac cells to transmit an impulse from cell to cell, not the direct response to the impulse by contracting.
3. A patient has a DNR (do-not-resuscitate) order but their family insists on resuscitation if necessary. What should the nurse do?
- A. Follow the family's wishes to resuscitate.
- B. Explain that the nurse must follow the DNR order.
- C. Ask the provider for clarification on the DNR.
- D. Call the ethics committee to discuss the situation.
Correct answer: B
Rationale: The correct answer is B. The nurse must follow the legal DNR order, even if the family insists on resuscitation. Respecting the patient's wishes is crucial in providing ethical care. Choice A is incorrect because the nurse should prioritize the patient's documented wishes over the family's requests. Choice C may cause unnecessary delays in care as the DNR order is a legal document. Choice D is not the initial action to take in this situation; the nurse should first address the conflict between the family's wishes and the patient's DNR order.
4. How should a healthcare professional respond to a patient experiencing hypoglycemia?
- A. Rechecking the blood glucose level in 15 minutes
- B. Encouraging the patient to eat a high-protein snack
- C. Administering 15g of fast-acting carbohydrates
- D. Administering glucagon if the patient is unconscious
Correct answer: C
Rationale: The correct response to a patient experiencing hypoglycemia is to administer 15g of fast-acting carbohydrates. This helps quickly increase the blood glucose levels in the patient, addressing the low blood sugar. Rechecking the blood glucose level in 15 minutes (Choice A) may delay necessary intervention, encouraging a high-protein snack (Choice B) is not recommended as it does not rapidly increase blood sugar levels, and administering glucagon if the patient is unconscious (Choice D) is typically done in severe cases of hypoglycemia when the patient is unable to eat or drink.
5. Dr. George predicted that positive reinforcement would increase prosocial behavior in preschoolers. Dr. George's prediction is an example of a __________.
- A. theory
- B. research question
- C. hypothesis
- D. research design
Correct answer: C
Rationale: Dr. George's prediction that positive reinforcement would increase prosocial behavior in preschoolers is an example of a hypothesis. A hypothesis is a specific, testable prediction about the relationship between variables based on existing knowledge or theories. In this case, Dr. George is making a prediction about the effect of positive reinforcement on prosocial behavior, which can be tested through research. Choice A, 'theory,' is incorrect because a theory is a broader explanation that integrates a range of findings and observations. Choice B, 'research question,' is incorrect as it refers to an inquiry that asks about the relationship between variables but lacks the specificity and testability of a hypothesis. Choice D, 'research design,' is incorrect as it pertains to the overall strategy or plan for conducting a research study, not the specific prediction Dr. George made.
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