Effects of EGb761, quecertin and bilobalide on the enrichment factors (EF) of DNA fragmentations in the hypoxia-reoxygenated cardiomyocytes. DNA fragmentation was determined with the cell death detection ELISA method. EF represented the enrichment of histone-associated mono- and oligonucleosomes released into the cytoplasm. Drug concentrations of EGb761, quecertin and bilobalide were 1, 10, 100 μg/ml respectively. Data are shown as mean ± SD (n = 5).