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CAMLPR Chemistry Practice Test

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Which analyte is affected by icterus and is a cardiac biomarker?
Correct Answer:
hsTNI
Explanation:
Icterus can interfere with some lab tests because bilirubin changes the color and optical properties of a sample, which can affect measurements that rely on light absorbance or color signals. Among the options, the one that is both a cardiac biomarker and subject to this kind of interference on some platforms is high-sensitivity troponin I. Troponin I is the standout indicator of heart muscle injury and is used to detect myocardial infarction. The other substances—estradiol, parathyroid hormone, and testosterone—are hormones or related peptides and are not cardiac injury markers, so they don’t fit the cardiac biomarker part of the prompt.

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