A nurse is reviewing the laboratory values of a client who had a myocardial infarction 3 hr ago. The nurse should expect which of the following laboratory values to be elevated?
Serum amylase
Unconjugated bilirubin
Aspartate aminotransferase (AST).
Troponin I
The Correct Answer is D
A. Serum amylase: Serum amylase is an enzyme associated with pancreatic function, and its elevation is not specific to myocardial infarction.
B. Unconjugated bilirubin: Elevation of unconjugated bilirubin is associated with liver function and hemolysis, not specifically with myocardial infarction.
C. Aspartate aminotransferase (AST): While AST may be elevated in conditions affecting the heart, it is not as specific or sensitive for myocardial infarction as troponin I.
D. Troponin I: This is the correct answer. Troponin I is a cardiac-specific biomarker released into the bloodstream when there is damage to cardiac muscle, such as during a myocardial infarction. Troponin I levels start to rise within 3-4 hours after the onset of myocardial infarction, making it a crucial marker for early detection.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Foot ulcers: Foot ulcers are more commonly associated with the later stages of peripheral arterial disease (PAD) when there is significant impairment of blood flow to the extremities, leading to tissue damage and delayed wound healing.
B. Intermittent claudication: This is the correct answer. Intermittent claudication is a classic symptom of PAD in the early stage. It is characterized by cramping leg pain or discomfort that occurs during physical activity, such as walking, and is relieved by rest. It is caused by insufficient blood flow to meet the demands of the muscles during exercise.
C. Rest pain: Rest pain is typically a symptom of more advanced PAD. It occurs when blood flow is severely compromised even at rest, leading to pain in the affected extremity that is not relieved by activity.
D. Dependent rubor: Dependent rubor is a sign of severe PAD and occurs when the foot or leg becomes red or flushed when in a dependent position. It is associated with compromised arterial blood flow.
Correct Answer is D
Explanation
A. Dependent edema: Dependent edema is more commonly associated with right-sided heart failure. In left-sided heart failure, fluid accumulates in the lungs, leading to pulmonary symptoms such as cough and frothy sputum.
B. Jugular distention: Jugular distention is often associated with right-sided heart failure due to impaired blood flow from the right atrium into the right ventricle. It is less likely to be prominent in left-sided heart failure.
C. Nocturnal polyuria: Nocturnal polyuria (increased urination at night) is a common symptom of heart failure, but it is not specific to left-sided heart failure. It can be seen in both left- and right-sided heart failure.
D. Frothy sputum: This is the correct answer. Left-sided heart failure can lead to pulmonary congestion, resulting in the accumulation of fluid in the lungs. Frothy, pink-tinged sputum is a characteristic finding in left-sided heart failure and is often associated with pulmonary edema.
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