The nurse draws blood from a client reporting acute chest pain and nausea that began five hours ago. Which of the following troponin-I levels would the nurse interpret as indicating a myocarial infarction?


• Any Troponin-I level greater than 0.03 ng/mL is indicative of myocardial damage.

• Troponin-I is more specific for cardiac muscle injury than CK-MB and elevates 4-6 hours after infarction.

• The remaining options are all within normal limits.

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