Table I.
MAP, HR, RT and blood gasanalysis at each time point.
| Prior to CPB | Block the aorta | Open the aorta | CPB 60 min | Stop CPB 2 h | |
|---|---|---|---|---|---|
| Variable | T0 | T1 | T2 | T3 | T4 |
| MAP, mmHg | 86.35±7.52 | 30.38±2.21a | 60.16±12.35a | 65.38±14.13a | 80.19±17.39 |
| HR, bpm | 330±28 | 0a | 200±24a | 280±31a | 310±35 |
| RT, °C | 36.21±1.53 | 34.37±0.82a | 35.81±1.16 | 36.53±0.95 | 36.58±1.42 |
| pH | 7.40±0.05 | 7.36±0.04 | 7.32±0.03 | 7.35±0.03 | 7.36±0.05 |
| PaO2, mmHg | 300±21 | 280±15 | 290±23 | 300±30 | 310±28 |
| PaCO2, mmHg | 38.56±2.23 | 36.98±4.05a | 37.63±3.32 | 36.58±2.58 | 35.43±2.40 |
| BE, mmol/l | −1.51±0.55 | −2.04±0.60 | −2.53±0.85 | −3.05±1.74 | −3.08±1.51 |
| HCT | 0.40±0.05 | 0.21±0.03a | 0.20±0.03a | 0.25±0.04a | 0.26±0.04a |
| K+, mmol/l | 4.82±0.63 | 4.41±0.75 | 5.24±0.95 | 5.36±0.72 | 5.04±0.46 |
a
P<0.05, compared with T0. CPB, cardiopulmonary bypass; MAP, mean arterial pressure; HR, heart rate; RT, rectal temperature; BE, base excess; HCT, hematocrit.