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. "DIC is controllable with lifelong heparin usage": This statement is not accurate. While heparin may be used in the treatment of DIC, it is not a lifelong therapy, and the approach to treatment depends on the underlying cause.
B. "DIC is caused by abnormal coagulation involving fibrinogen": This is the correct answer. DIC is a condition characterized by widespread activation of the clotting cascade, leading to the formation of microthrombi throughout the body. Abnormal coagulation involves the consumption of clotting factors, including fibrinogen.
C. "DIC is a genetic disorder involving a vitamin K deficiency": This statement is not accurate. DIC is not a genetic disorder, and it is not primarily related to vitamin K deficiency. It is an acquired condition often associated with severe infections, sepsis, trauma, or other critical illnesses.
D. "DIC is characterized by an elevated platelet count": This statement is not accurate. In DIC, there is often a decrease in platelet count due to consumption and activation of platelets in the widespread formation of microthrombi.
Correct Answer is B
Explanation
Correct answer: B
A. "I will take my diuretic before sleep and drink fluids during the day": This statement is not correct. Diuretics are usually taken in the morning to avoid disrupting sleep with increased urination at night. Additionally, fluid intake is generally restricted in congestive heart failure to manage fluid balance.
B. "I plan to slow down if I am tired the day after exercising":This statement reflects an understanding of the need to manage activity levels and recognize the signs of overexertion, which is crucial for clients with congestive heart failure. Pacing activities and allowing for adequate rest can help prevent exacerbations of heart failure symptoms.
C. "I will read food labels and limit my sodium to 4 grams per day": This is incorrect. Limiting sodium intake is a key component of heart failure management. The recommended sodium intake for individuals with heart failure is often much lower than 4 grams per day, typically around 2 grams or less.
D. "I should use naproxen to manage discomfort": Using nonsteroidal anti-inflammatory drugs (NSAIDs) like naproxen can contribute to fluid retention and worsen heart failure symptoms. This statement is not indicative of effective teaching.
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