... plays an important role. The molecular weight of cardiac troponin I to 22.5KD. Myocardial injury cTnI easily released in ... this isomer is non-existent, making a cardiac - specific troponin I.Acute myocardial damage, cTnI immediate access to blood circulation, a ... is only used in vitro measurement of serum cardiac troponin I (cTnI). Reaction devices and processing specimens in accordance with ...