Troponin - Troponin I

What do the test results mean?

If a heart attack has taken place, the amount of troponin I in the blood will start to rise within the first 4 to 6 hours. Almost half of the time, it will be elevated before the fourth hour. This blood test usually becomes positive earlier than other blood tests that are used to diagnose a heart attack. This test is very important to ensure the earliest treatment of a heart attack. The normal value for troponin I is less than 0.7 mg/ml.