Timby's Introductory Medical-Surgical Nursing Thirteenth, North American Edition - Caring for Clients With Disorders of Coronary and Peripheral Blood Vessels Related

Review Timby's Introductory Medical-Surgical Nursing Thirteenth, North American Edition - Caring for Clients With Disorders of Coronary and Peripheral Blood Vessels related questions and content

After 2-hour onset of acute chest pain, the client is brought to the emergency department for evaluation. Elevation of which diagnostic findings would the nurse identify as suggestive of an acute myocardial infarction at this time?

  • A. Troponin I
  • B. Myoglobin
  • C. WBC (white blood cell) count
  • D. C-reactive protein
Correct Answer: B

Rationale: Myoglobin is a biomarker that rises in 2 to 3 hours after heart damage. Troponin is the gold standard for determining heart damage, but troponin I levels do not rise until 4 to 6 hours after MI. WBCs and C-reactive protein levels will rise but not until about day 3.