What is the reported normal value for Troponin?

What is the reported normal value for Troponin?

• A. <0.1
• B. 0.1-0.5
• C. 1.0
• D. 5.0

Answer: (A)

Troponin is a cardiac-specific protein, and in a person without myocardial damage it remains extremely low in the blood. The NBRC normal value used is less than 0.1 ng/mL, which reflects the high specificity of troponin for heart injury. Values at or above 0.1 ng/mL suggest myocardial injury and warrant further evaluation, often with serial measurements to look for a rising or falling pattern. Therefore, the best representation of a normal troponin value is the level under 0.1 ng/mL.

Troponin is a cardiac-specific protein, and in a person without myocardial damage it remains extremely low in the blood. The NBRC normal value used is less than 0.1 ng/mL, which reflects the high specificity of troponin for heart injury. Values at or above 0.1 ng/mL suggest myocardial injury and warrant further evaluation, often with serial measurements to look for a rising or falling pattern. Therefore, the best representation of a normal troponin value is the level under 0.1 ng/mL.