This is the first report in the forensic literature of a combination o
f fatal digoxin poisoning with endocardial fibroelastosis (EFE). Typic
al morphological features of EFE as the cause of clinically diagnosed
cardiomyopathy were present in the autopsy of a 3-year-old girl, inclu
ding cardiac hypertrophy and marked thickening of the left-sided endoc
ardium, consisting of numerous elastic and collagenic fibres. After ex
clusion of cardiac and cerebral causes of death, accidental digoxin in
toxication was proved. Postmortem toxicological analyses by fluorescen
ce polarization immuno-assay (FPIA) disclosed digoxin levels of 71 mu
g/kg (femoral vein blood), 77 mu g/kg (cardiac blood), 255 and 221 mu
g/kg (cardiac muscle of the right and left chamber), 163 mu g/kg (psoa
s muscle), 91 mu g/kg (lung), 222 mu g/kg (liver) and 520 mu g/kg (kid
ney). The results are compared with the antemortem digoxin concentrati
on of 39 mu g/ml serum. The case is discussed from its unusual morphol
ogical and toxicological aspects, with special consideration of possib
le medical malpractice. (C) 1997 Elsevier Science Ireland Ltd.