Long-time quality assessment of the Elecsys Troponin T hs assay.

Recently, Roche announced a problem with the calibrators for their high sensitive cardiac troponin T (hscTnT) assay. We have monitored the performance of the assay since its introduction into clinical use in December 2009 and we're in a unique position to provide quantitative information concerning the effects of this problem. Our data document that the measured cTnT concentration in the hscTnT assay dropped by 5.