Abstract
Cardiac troponins are the most sensitive and specific biochemical markers of myocardial damage but there is no standardization of WHO for cardiac troponin I, resulting in a variability for diagnostic value. It is necessary to determine diagnostic value for a new kitof troponin I. To evaluate a new quantitative immunochromatography assay for troponin I at a various cut off level. A cross sectionalstudy was conducted in 64 patients with acute myocardial infarction (AMI) and 55 non-AMI as control from February to September2007. The level of cardiac troponin I (cTnI) was measured and determined it diagnostic value at a various cut off level. The sensitivity,specificity, PPV and NPV of this assay were 91%, 91%, 92% and 89% at cut off level of 1,0 ng/ml (according to the kit), respectively.The cut off of cTnI were divided into five levels: 0.8, 1.0, 1.2, 1.5, and 2.0 with the area under curve were 0.923, 0.908, 0.912, and0.897, respectively. The sensitivity were 94%, 91%, 86%, 81% and 72%, respectively, the specificity were 91%, 91%, 96%, 98% and98%, respectively. This rapid diagnostic test is sensitive and specific to diagnose an acute coronary syndromes.
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