What is the significance of elevated serum levels of troponin?
This intracellular substance can leak into the blood with cardiac cellular injury or death.
Elevated serum levels of troponin occur because of sustained glycogenolysis.
This substance is elevated when a patient has acute tubular necrosis.
Serum elevation of this acute phase reactant occurs because of tissue injury.
The Correct Answer is A
Choice A rationale
Elevated serum levels of troponin indicate cardiac cellular injury or death. Troponin is a protein released into the bloodstream when heart muscle cells are damaged, such as during a myocardial infarction.
Choice B rationale
Sustained glycogenolysis does not cause elevated troponin levels. Glycogenolysis is the breakdown of glycogen to glucose, primarily occurring in the liver and muscles, not related to troponin release.
Choice C rationale
Acute tubular necrosis does not elevate troponin levels. This condition affects the renal tubules and is typically indicated by elevated creatinine and BUN levels.
Choice D rationale
Troponin is not an acute phase reactant. Acute phase reactants are proteins whose levels change in response to inflammation, such as C-reactive protein (CRP), not troponin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Hyperkalemia can cause weakness and fatigue, but it is not directly related to acute coronary syndrome (ACS). ACS is primarily associated with chest pain and other cardiac symptoms.
Choice B rationale
Experiencing chest pain when climbing a flight of stairs may indicate stable angina, which is a form of chronic coronary artery disease. However, it does not meet the criteria for ACS, which involves more severe and persistent symptoms.
Choice C rationale
Persistent and severe chest pain when at rest is a hallmark symptom of acute coronary syndrome (ACS). This condition requires immediate medical attention as it can lead to myocardial infarction (heart attack) or other serious complications.
Choice D rationale
Paroxysmal nocturnal dyspnea (PND) is a symptom of heart failure, not acute coronary syndrome (ACS). While heart failure can coexist with ACS, PND alone does not indicate ACS4.
Correct Answer is A
Explanation
Choice A rationale
Administering antipyretic medication as prescribed is a priority intervention for a client with a body temperature of 38°C (100.4°F). Antipyretics help reduce fever and provide comfort to the patient. They work by inhibiting the production of prostaglandins, which are involved in the fever response.
Choice B rationale
Encouraging fluid intake to prevent dehydration is also important, but it is not the priority intervention. Adequate hydration helps maintain fluid balance and supports the body’s ability to regulate temperature.
Choice C rationale
Monitoring vital signs every 4 hours is essential for assessing the patient’s condition, but it is not an intervention that directly addresses the fever. It helps track the patient’s response to treatment and detect any changes in their condition.
Choice D rationale
Applying a cooling blanket to reduce fever can be effective, but it is typically used when antipyretic medications are not sufficient or contraindicated. Cooling measures help lower body temperature through conduction and evaporation.
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