Your patient in the Emergency Room reports having severe chest pain and you suspect a heart attack. Which of the following laboratory tests would be best to confirm your suspicions?
Troponin I & T
Myoglobin
BNP
CK-MB isoenzymes
The Correct Answer is A
A. These are the most specific and sensitive markers for diagnosing a heart attack. They are released into the bloodstream when heart muscle is damaged.
B. Myoglobin is an early marker of heart muscle damage, but it is less specific than troponin and can be elevated in other conditions.
C. B-type natriuretic peptide is a hormone primarily used to diagnose heart failure, not acute myocardial infarction (heart attack).
D. Creatine kinase-MB is an older marker for heart damage, but it is less specific than troponin and takes longer to rise in the blood.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Blood transfusions are not indicated for DKA unless there's severe anemia, which is not a common presentation.
B. Blood sugar checks every 4 hours and subcutaneous sliding scale Insulin are not appropriate for the severe hyperglycemia and dehydration present in DKA.
C. TPN is not necessary as the patient can tolerate oral intake once stabilized.
D. Continuous IV fluid administration is essential to correct dehydration and electrolyte imbalances, which are common in DKA. Isotonic solutions like normal saline or lactated Ringer's are typically used.
Correct Answer is C
Explanation
A. Anemia is a decrease in red blood cells, opposite to the condition described.
B. Hypoxic drive refers to the body's adaptation to use low oxygen levels as a stimulus to breathe, not an increase in red blood cells.
C. Polycythemia refers to an abnormal increase in red blood cells, which is a compensatory mechanism for chronic hypoxia.
D. Pancytopenia is a decrease in all types of blood cells, not an increase in one specific type.
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