A nurse is reviewing the laboratory findings of a client who experienced an acute myocardial infarction 6 days ago. Which of the following laboratory values should the nurse expect to remain elevated at this time?
Troponin T
Creatinine phosphokinase
Myoglobin
Creatinine kinase-MB
The Correct Answer is A
A. Troponin T: Troponin T remains elevated for 10 to 14 days after a myocardial infarction. This protein is highly specific for cardiac muscle injury and is used to confirm myocardial infarction.
B. Creatinine phosphokinase: Creatinine phosphokinase (CPK) typically returns to normal levels within 3 days after a myocardial infarction, so it would no longer be elevated at this point.
C. Myoglobin: Myoglobin rises early after a myocardial infarction but is not specific to heart muscle and returns to normal within 24 hours, so it would not be elevated at this time.
D. Creatinine kinase-MB: Creatinine kinase-MB (CK-MB) usually returns to normal levels within 2 to 3 days after a myocardial infarction, so it is unlikely to still be elevated 6 days later.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. "Nitroglycerin dilates cardiac blood vessels to deliver more oxygen to the heart." Nitroglycerin works by dilating the coronary arteries, increasing blood flow and oxygen delivery to the heart muscle, thereby reducing angina.
B. "Nitroglycerin relieves nausea and prevents vomiting, which could lead to aspiration." Nitroglycerin does not have an antiemetic function or impact nausea and vomiting.
C. "Nitroglycerin acts as a bronchodilator to open small airways and decrease shortness of breath." Nitroglycerin is not a bronchodilator. It does not act on the airways but instead works on blood vessels.
D. "Nitroglycerin decreases chest pain by dissolving blood clots that are occluding the arteries." Nitroglycerin does not dissolve blood clots. Thrombolytic agents are used for clot dissolution, not nitroglycerin.
Correct Answer is ["2"]
Explanation
Tablets=Desired dose ÷ Available dose
= 500mg ÷ 250mg/tab
= 2 tablets
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