Blood lactate and s100β measurements:
Lactate levels were studied before, during and after ASCP (during the first minute) from the left radial artery cannula. Samples were also taken in the 2nd and 6thpostoperative hour. During ASCP an additional blood sample was taken from descending aorta to correlate with the radial artery sample. For s100β determination blood samples were obtained from descending aorta just before terminating ASCP and from radial artery in the 6th postoperative hour. Kits obtained from Cloud Clone Human ELİSA were used for s100β determination. All blood samples were centrifuged for 20 minutes with 1000 cycles/minute and the sera obtained were kept at 80°C to be dissolved all at once.