during cardiopulmonary bypass , myocardial po2 was significantly higher in a spontaneously fibrillating heart ( 5.4 +/- 0.9 kpa ) than during the initial beating period ( 3.7 +/- 0.5 kpa ) or after defibrillation ( 4.0 +/- 0.7 kpa ) .
C0027061
myocardial
C0018787
heart