Fig. 2From: Del Nido versus HTK cardioplegia for myocardial protection during adult complex valve surgery: a retrospective studyPerioperative comparison serum levels of myocardial injury markers between the DN group and the HTK group. DN, del Nido; HTK, histidine-tryptophan-ketoglutarate; cTnI, cardiac troponin I; CK-MB, creatine kinase myocardial isoenzyme; AST, serum aspartate transaminase. (See the Additional file 2: instruction 4, no statistical differences were found)Back to article page