Ischemia—modified albumin measured with ultra—filtration assay in early diagnosis of acute coronary syndrome.docVIP

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Ischemia—modified albumin measured with ultra—filtration assay in early diagnosis of acute coronary syndrome.doc

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Ischemia—modified albumin measured with ultra—filtration assay in early diagnosis of acute coronary syndrome

Ischemia—modified albumin measured with ultra—filtration assay in early diagnosis of acute coronary syndrome BACKGROUND： Patients with acute chest pain remain a great diagnostic challenge to emergency physicians. Ischemia-modified albumin （IMA） is a recently developed biomarker of transient myocardial ischemia. IMA has already been licensed by the US Food and Drug Administration for diagnosis of suspected myocardial ischemia. This study aimed to assess the diagnostic value of IMA in treatment of patients with acute coronary syndrome（ACS）. METHODS： IMA level was detected by ultra-filtration assay combined with albumin-cobalt binding （ACB） test as well as tests of myoglobin （MYO）， creatine kinase-MB （CK-MB） and cardiac troponin I （cTnI） in 169 consecutive patients with acute chest pain onset within 24 hours. Receiver operating characteristic （ROC） curve for IMA in diagnosing ACS was established to determine the cut-off point. The sensitivity， specificity， positive predictive value （PPV） and negative predictive value （NPV） of IMA and its combinations with other agents were analyzed. RESULTS： Area under the ROC curve （AUC） was 0.754. As the cut-off point for IMA in this study was 70.4 U/ml， the sensitivity， specificity， PPV and NPV of IMA were 79.8%， 65.2%±77.7%， and 69.7%， respectively. The sensitivity and NPV of IMA combined with the conventional cardiac marker panel for the diagnosis of ACS were 93.4% and 86.0%， respectively. CONCLUSION： IMA is a useful biochemical marker for the early diagnosis of ACS. IMA combined with the conventional cardiac marker panel can improve early diagnosis of ACS compared with the traditional combinations of myocardial biochemical markers. KEY WORDS： Ischemia-modified albumin； Acute coronary syndrome World J Emerg Med 2010；1（1）：37-40 INTRODUCTION Patients with acute chest pain remain a great diagnostic challenge to emergency physicians. It is estimated that 30% of patients presenting with chest pain will be diagnos