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Cardiac Biomarkers (Blood) - Health Encyclopedia - University of Rochester Medical Center

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This test measures the levels of cardiac biomarkers in your blood. These markers include enzymes, hormones, and proteins. Cardiac biomarkers show up in your blood after your heart has been under severe stress and becomes injured because it isn't getting enough oxygen. This might be because you've had a heart attack. But these levels can be high for other reasons. The levels of biomarkers are often used to quickly find out the size of a heart attack and how seriously your heart was affected. These cardiac biomarkers can be used to diagnose a heart attack: Cardiac troponin. This protein is by far the most commonly used biomarker. It has the highest known sensitivity. It enters into your bloodstream soon after a heart attack. It also stays in your bloodstream days after all other biomarkers go back to normal levels. Two forms of troponin may be measured: troponin T and troponin I. Troponin I is highly specific to the heart and stays higher longer than creatinine kinase-MB. Current guideli

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