TNNI3 and heart disorder: Compared with patients identified by the contemporary assay, those reclassified were as likely to present with chest pain (67% in those reclassified vs 71% in those identified by the cTn I assay) and have a history of ischaemic heart disease (36% vs 33%), but were less likely to show myocardial ischaemia on the electrocardiograph (14% vs 36%).