title: Unexpectedly elevated cardiac troponin I level in the patient without acute coronary syndrome.
abstract: BACKGROUND
  Since cTnI assay is leading test in diagnostic of myocardial infarctions, and it is used for risk assessment in patients with ACS as well as unstable angina pectoris, it is very important to measure its concentration accurately and precisely.
  
  
  METHODS
  Here we report a case in which there was a significant difference in the cTnI concentrations measured by three different methods, which was detected in one patient's sera during preoperative evaluation for cardiac surgery.
  
  
  RESULTS
  Due to variations in the results for the cTnI concentrations (0.62; 0.13; 0.89 microg/L), the question was raised about the possibility of an interference known to occur in especially rare situations. A 76-year-old male was operated, temporal elevation and subsequent decrease in the concentrations of cTnI were monitored.
  
  
  CONCLUSIONS
  It was observed that results obtain with different assays are not comparable.
authors.affiliation: Clinical Department of Laboratory Diagnostics, Clinical Hospital Center Rijeka, Rijeka, Croatia. snjezana.hrabric.vlah@gmail.com
authors.forename: Snjezana Hrabric
authors.initials: SH
authors.lastname: Vlah
authors.forename: Jadranko
authors.initials: J
authors.lastname: Sokolic
authors.forename: Igor
authors.initials: I
authors.lastname: Medved
authors.forename: Stefica
authors.initials: S
authors.lastname: Dvornik
mesh_terms: D000368:Aged; D003402:Creatine Kinase / Q000097:blood; D003951:Diagnostic Errors; D006801:Humans; D007118:Immunoassay / Q000379:methods* / Q000592:standards; D008297:Male; D017202:Myocardial Ischemia / Q000097:blood* / Q000201:enzymology; D009204:Myocardial Revascularization; D015203:Reproducibility of Results; D019210:Troponin I / Q000097:blood*
chemical_list: D019210:Troponin I; D003402:Creatine Kinase