The doxorucin-containing regimen (CHOP) and epirubicin-containing regimen (CEOP) are both frequently used in patients with aggress B-cell lymphoma in out institution. According to a Cochrane meta-analysis, epirubicin is less cardiotoxic than doxorubicin on a mg per mg basis. However, compared with 50mg/m2 of doxorubicin in CHOP, epirubicin was usually used at a higher dose (70mg/m2) to treat non-Hodgkin's lymphoma (NHL). Because of the correlation between cumulative dose and risk of cardiotoxicity, it is reasonable to speculate that CEOP (70mg/m2) has less cardiotoxicity than CHOP (50mg/m2) when both regimens are administered with similar cycles.