Cardiac troponin T in newborn infants with transient myocardial ischemia.
Cardiac troponin T (TnT) is a regulatory contractile protein whose detection in the circulation has been shown to be a specific and sensitive marker for ischemic myocardial cell injury both in adult and pediatric populations. We measured serum cardiac TnT in 15 consecutive full-term neonates presenting with bradycardia and electrocardiographic features of transient myocardial ischemia. Their median TnT concentrations (0.5 microg/l, range 0.01-0.37) were statistically comparable to our laboratory reference values for healthy term newborns (median 0.17 microg/l, range 0.01-0.42) (p = NS), but significantly higher with respect to our reference limits for healthy adults (median 0.01 micog/l, range 0.01-0.1) (p < 0.05). Our data demonstrate high TnT levels in neonates during the first days of life with respect to adults and similar TnT concentrations in term infants with and without TMI.
Trevisanuto
D
D
Pediatric Department, University of Padova, Italy.
Lachin
M
M
Zaninotto
M
M
Pellegrino
P A
PA
Plebani
M
M
Cantarutti
F
F
Zanardo
V
V
D001919:Bradycardia; D004562:Electrocardiography; D006801:Humans; D007231:Infant, Newborn; D017202:Myocardial Ischemia / Q000097:blood* / Q000175:diagnosis; D012016:Reference Values; D014336:Troponin / Q000097:blood*; D020107:Troponin T
D014336:Troponin; D020107:Troponin T