Figure 1 Mean arterial pressure measured in the subclavian artery after gunshot inflicted penetrating cardiac wounds. Mean arterial pressure decreased in Gp1 and animals died within 18 min after injury. Animals in Gp2 and Gp3 maintained mean arterial pressure ranging from 60–90 mm Hg during emergent cardiopulmonary bypass (CPB). However, following the termination of CPB, mean arterial pressure decreased in Gp2. In Gp3, after terminating CPB, most animals maintained haemodynamic stability. Mean arterial pressure was lower in Gp2 compared to Gp3 (p<0.05) at 60 min following termination (p<0.05).