ATI RN
ATI Capstone Adult Medical Surgical Assessment 2
1. What is a characteristic sign of hypokalemia on an ECG?
- A. Flattened T waves
- B. ST elevation
- C. Prominent U waves
- D. Widened QRS complex
Correct answer: A
Rationale: Flattened T waves are a characteristic sign of hypokalemia on an ECG. When potassium levels are low, it can lead to changes in the ECG, such as T wave flattening. This alteration is important to recognize as it indicates potential electrolyte imbalances. ST elevation (Choice B) is not typically associated with hypokalemia but can be seen in conditions like myocardial infarction. Prominent U waves (Choice C) are associated with hypokalemia, but flattened T waves are more specific. Widened QRS complex (Choice D) is not a typical ECG finding in hypokalemia but can be seen in conditions like hyperkalemia.
2. Which fibers distribute the electrical impulse to the ventricles, causing them to contract?
- A. Purkinje fibers
- B. SA node
- C. AV node
- D. Bundle of His
Correct answer: A
Rationale: The correct answer is Purkinje fibers. Purkinje fibers are specialized conducting fibers that distribute the electrical impulse to the ventricles, leading to their contraction. The SA node (sinoatrial node) is responsible for initiating the electrical impulse in the heart, the AV node (atrioventricular node) delays the impulse to allow for proper atrial contraction before ventricular contraction, and the Bundle of His transmits the impulse from the AV node to the ventricles. Therefore, choices B, C, and D are not the correct options for fibers directly distributing the impulse to the ventricles.
3. A patient has been diagnosed with a thrombotic stroke. What are the expected manifestations?
- A. Gradual loss of function on one side of the body
- B. Sudden loss of consciousness
- C. Seizures and confusion
- D. Loss of sensation in the affected limb
Correct answer: A
Rationale: The correct answer is A: 'Gradual loss of function on one side of the body.' Thrombotic strokes lead to slow and progressive symptoms as a result of decreased blood flow to a specific area of the brain. Choices B, C, and D are incorrect because sudden loss of consciousness, seizures, confusion, and loss of sensation in the affected limb are not typical manifestations of a thrombotic stroke.
4. A nurse is assessing a client who is postoperative following a hip arthroplasty. Which of the following findings should the nurse report to the provider?
- A. Heart rate of 90/min
- B. Redness and warmth in the calf
- C. Oxygen saturation of 95%
- D. Temperature of 37.3°C (99.1°F)
Correct answer: B
Rationale: Redness and warmth in the calf can indicate a blood clot, specifically deep vein thrombosis (DVT), which is a serious complication post hip arthroplasty. The warmth and redness are signs of inflammation due to the clot formation. DVT can lead to a pulmonary embolism if not addressed promptly. Monitoring for this complication is crucial in postoperative care. Elevated heart rate, oxygen saturation within normal limits, and a slightly elevated temperature are common findings postoperatively and may not be alarming in the absence of other concerning symptoms.
5. Select all that apply. To lower LDL levels, you should:
- A. consume minimal amounts of hydrogenated and saturated fats
- B. consume more insoluble fibers than soluble fibers
- C. consume alcohol in moderate levels
- D. engage in regular physical activity
Correct answer: A
Rationale: To lower LDL levels, reducing intake of hydrogenated (trans) and saturated fats is crucial, as these types of fats can raise LDL cholesterol in the blood. Choice B is incorrect because both soluble and insoluble fibers can help lower LDL levels. Choice C is incorrect as excessive alcohol consumption can lead to increased LDL levels. Choice D, engaging in regular physical activity, can help raise HDL (good) cholesterol levels but is not directly related to lowering LDL levels.
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