Postoperative day @ , day @ , and peak creatinine levels were lower in the carvedilol plus NAC group ( @ -LSB- @-@ @ -RSB- , @ -LSB- @-@ @ -RSB- and @ -LSB- @-@ @ -RSB- ) as compared with the metoprolol ( @ -LSB- @-@ @ -RSB- , @ -LSB- @-@ @ -RSB- and @ -LSB- @-@ @ -RSB- ) or carvedilol groups ( @ -LSB- @-@ @ -RSB- , @ -LSB- @-@ @ -RSB- and @ -LSB- @-@ @ -RSB- mg/dL ; all P values < @ ) , but were similar between the metoprolol and carvedilol groups ( all P values > @ ) .