Table 2 Results of pH analysis with Khuri Intramyocardial pH probe

Initial pH

7.133 (SD 0.0635)

range 6.974–7.239

7.132 (SD 0.0121)

7.134 (SD 0.0305)

0.958

pH after 1st XC

6.381 (SD 0.165)

range 6.034–6.684

6.445 (SD 0.126)

6.317 (SD 0.183)

0.124

pH Recovery after 1^st XC

6.723 (SD 0.324)

range 6.200–7.222

6.990 (SD 0.561)

range 6.808–7.222

6.455 (SD 0.067)

range 6.2000–6.737.

<0.0005

pH after 2^nd XC

6.495 (SD 0.192)

range 6.118 – 6.820

6.610 (SD 0.131)

6.381 (SD 0.180)

0.012

Ph Recovery after 2^nd XC

6.769 (SD 0.303)

range 6.210 – 7.159

7.005 (SD 0.1193)

6.537 (SD 0.240)

<0.0005

pH after 3^rd XC

6.530 (SD 0.267)

range 6.19 to 6.89

6.736 (SD 0.159)

6.376 (SD 0.224)

0.006

pH recovery after 3^rd XC

6.919 (SD 0.304)

range 6.23 to 7.28

7.081 (SD 0.0838)

6.798 (SD 0.356)

0.084

Final pH

7.050 (SD 0.188)

range 6.55–7.33.

7.062 (SD 0.0945)

7.038 (SD 0.258)

0.810

pH drop for each period of cross clamping

Drop in 5 mins 1^st XC

0.355 (SD 0.0690)

0.320 (SD 0.165)

Drop in 5 mins 2^nd XC

0.186 (SD 0.175)

0.0742 (SD 0.0708)

Drop in 5 mins 3^rd XC

0.152 (SD 0.0696)

0.103 (SD 0.119)

P value

0.009