GPT and cardiac arrhythmia: There were arrhythmias in 18 patients (60%), cardiomyopathy in 13 patients (43.3%), hepatomegaly in 4 patients (13.3%), seizures in 9 patients (30%), hyperammonemia in 22 patients (73.3%), increase of CKMB and ALT in 17 patients (56.7%) and 12 patients (40%) respectively.