ATI RN
Cardiovascular System Practice Exam
1. What is the condition where the heart's mitral valve becomes narrowed, restricting blood flow from the left atrium to the left ventricle?
- A. Mitral stenosis
- B. Aortic stenosis
- C. Tricuspid regurgitation
- D. Pulmonary hypertension
Correct answer: A
Rationale: Mitral stenosis is the correct answer. It is a condition characterized by the narrowing of the heart's mitral valve, which hinders the flow of blood from the left atrium to the left ventricle. This obstruction can lead to symptoms such as shortness of breath and fatigue. Aortic stenosis (choice B) is the narrowing of the aortic valve, not the mitral valve. Tricuspid regurgitation (choice C) is the backflow of blood through the tricuspid valve, not narrowing. Pulmonary hypertension (choice D) is increased blood pressure in the pulmonary arteries, not narrowing of the mitral valve.
2. What is another name for the knee-chest position?
- A. Genu-dorsal
- B. Genu-pectoral
- C. Lithotomy
- D. Sim’s
Correct answer: B
Rationale: The knee-chest position is correctly identified as the genu-pectoral position. In this position, a person rests on their knees and chest with the abdomen raised and the head turned to one side. This position is commonly used in medical examinations and procedures involving the rectal or pelvic areas, allowing for better visualization and access. Choice A, 'Genu-dorsal,' is incorrect as it does not refer to the knee-chest position. Choice C, 'Lithotomy,' is incorrect as it refers to a position where the patient is lying on their back with legs flexed and feet in stirrups, commonly used during childbirth or certain surgeries. Choice D, 'Sim’s,' is incorrect as it refers to a position where the patient lies on their left side with the right knee and thigh drawn up with the left arm placed along the back.
3. How is the stomach protected from damage by gastric acid?
- A. enzymes present in the stomach
- B. a protective bacteria in the stomach
- C. bicarbonate present in the stomach
- D. the mucus lining of the stomach
Correct answer: D
Rationale: The correct answer is D. The stomach is protected from gastric acid by a thick mucus lining that acts as a physical barrier, preventing the acid from eroding the stomach walls. Enzymes in the stomach help with digestion but do not play a significant role in protecting the stomach from acid damage, so choice A is incorrect. While some bacteria in the stomach can be beneficial, they do not primarily protect the stomach from gastric acid, making choice B incorrect. Bicarbonate, a base, can neutralize acid, but it is not the primary defense mechanism against gastric acid in the stomach, so choice C is also incorrect.
4. A hospitalized child with minimal change nephrotic syndrome is receiving high doses of prednisone. What nursing goal is appropriate for this child?
- A. Stimulate appetite
- B. Detect evidence of edema
- C. Minimize risk of infection
- D. Promote adherence to the antibiotic regimen
Correct answer: C
Rationale: Prednisone, an immunosuppressant, increases the child's susceptibility to infections, making infection prevention a critical nursing goal. Detecting edema and stimulating appetite are important but secondary to preventing potentially life-threatening infections.
5. After change-of-shift report, which patient should the nurse assess first?
- A. 19-year-old with type 1 diabetes who was admitted with possible dawn phenomenon
- B. 35-year-old with type 1 diabetes whose most recent blood glucose reading was 230 mg/dL
- C. 60-year-old with hyperosmolar hyperglycemic syndrome who has poor skin turgor and dry oral mucosa
- D. 68-year-old with type 2 diabetes who has severe peripheral neuropathy and complains of burning foot pain
Correct answer: C
Rationale: The patient with hyperosmolar hyperglycemic syndrome who presents with poor skin turgor and dry oral mucosa requires immediate attention. These signs indicate severe dehydration and potential electrolyte imbalances, which can lead to serious complications. Assessing this patient first allows for prompt intervention and monitoring to stabilize their condition. Choice A is less urgent as the patient has possible dawn phenomenon, which is a common early-morning rise in blood glucose levels. Choice B, with a blood glucose reading of 230 mg/dL, indicates hyperglycemia but does not present with signs of severe dehydration like the patient in choice C. Choice D, with peripheral neuropathy and foot pain, is important but not as urgent as addressing severe dehydration and electrolyte imbalances in the patient with hyperosmolar hyperglycemic syndrome.
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