Table 2

Existing management strategies for low-risk chest pain

	Location	Troponin assay	Troponin threshold used(μg/l)	Troponin 99th centile	Laboratory analyser	Timing of troponin (h)^*	Other biomarkers
Barnsley	Inpatient ward	Siemens Centaur Troponin I Ultra	<0.2	0.04	Siemens Centaur XP	12
Derriford	Clinical Decision Unit	Roche Troponin T	<0.01	<0.01	Roche Modular E170 (4^th generation assay)	6
Edinburgh	Medical Assessment Unit	Abbott STAT Troponin I	<0.05^†	0.08	Architect i2000SR	12	Creatine kinase
Frenchay	Clinical Decision Unit	Beckman Coulter Access Accu Troponin I	<0.06	0.04	Beckman Coulter Access 2	12
Leeds	Clinical Decision Unit	Siemens Centaur Troponin I Ultra	<0.05	0.04	Siemens Centaur XP	12
Leicester	Inpatient ward	Siemens Centaur Troponin I Ultra	<0.06	0.04	Siemens Centaur XP	12	Creatine kinase