Being sudden cardiac death (SCD) and acute myocardial infarction (AMI) frequent occurrences in forensic medicine, extensive research has been published about the use of cardiac troponin T (cTnT) as a potential specific postmortem biochemical marker. However, cTnT has produced uncertain results, leading to the lack of a standardized application in routine postmortem examinations. The present systematic review focuses on the determination of whether cTnT may be considered as a suitable marker for the postmortem diagnosis of AMI and SCD, analysing the literature according to the following criteria: only human experiments, published from 1st January 2001 to 12th April 2018, available in English, on the following databases: (1). Medline/PubMed/MeSH search words: (("heart"[MeSH Terms] OR "cardiac"[All Fields]) AND ("troponin"[MeSH Terms] OR "troponins"[All Fields]) AND forensic[All Fields] AND "postmortem"[All Fields]); (2). Embase, Lilacs and Cochrane Library. 16 full-text articles were included. cTnT has been demonstrated to be elevated in a variety of pathological conditions, not strictly related to cardiac causes, but rather to the severity and extent of myocardial damage from various causes. cTnT levels have been consistently found higher in pericardial fluid than in the peripheral blood. Reviewed studies showed that the most suitable biological sample for cTnT evaluation seems to be pericardial fluid, since it may be less affected by haemolysis of blood. cTnT seems to be quite stable up to a PMI (postmortem interval) smaller than 48h; after this time, a mild time-dependent increase has been demonstrated. CPR seems to have no influence on cTnT values. The postmortem cut-offs differ from clinical ones, and at present no consensus has been reached concerning the postmortem ranges. Further research needs to be carried out in order to establish a common accepted cut-off value for forensic use.
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