GPT and atrial fibrillation: In addition, the plasma AST and ALT levels in AF/CO group were significantly elevated by 2.5-fold (185.9 ± 13.3 vs. 74.8 ± 8.6) and 2-fold (104.8 ± 11.4 vs. 52.6 ± 5.9) compared with that in pair-fed PO/CO group, respectively.