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Clinical Nurse Specialist CNS Adult Practice Test

Category - AACN Clinical Nurse Specialist Practice Test

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A nurse reviews the laboratory results of a client admitted due to crushing left-sided substernal chest pain. The nurse determines that which of the following findings supports a diagnosis of acute myocardial infarction?
  1. Level of LDH rises within the first 8 hours of MI
  2. Myoglobulin level rises after the first 24 hours
  3. Normal CK-MB within the first 24 hours
  4. Total creatine kinase rises within 24 hours after cardiac damage
Explanation
Answer - D - Total creatine kinase rises within 24 hours after damage of cardiac tissue. The level of LDH rises after the first 24 hours, whereas myoglobin level increases within 2 to 3 hours and is expected to return to normal within 24 to 36 hours. CK-MB rises about 3 to 4 hours after the onset of chest pain.
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