Document Classification

Section Type: RESULTS

Text: In the in vitro studies, the atrial muscles obtained before cardiopulmonary bypass were protected by ischemic preconditioning (creatine kinase = 2. 6 + / - 0. 2 and 3 - [4, 5-dimethylthiazol-2-yl] -2, 5 - diphenyltetrazolium bromide reduction = 152 + / - 24 vs creatine kinase = 5. 4 + / - 0. 6 and 3 - [4, 5-dimethylthiazol-2-yl] -2, 5 - diphenyltetrazolium bromide reduction = 87 + / - 16 in controls ; P <. 05) ; however, the muscles obtained 10 minutes after initiation of cardiopulmonary bypass were already protected (creatine kinase = 0. 8 + / - 0. 1 and 3 - [4, 5-dimethylthiazol-2-yl] -2, 5 - diphenyltetrazolium bromide reduction = 316 + / - 38), and ischemic preconditioning did not result in further improvements.