Hemodynamic variables of patients who received vasopressors in the operating room compared with those who did not
| Factor | No vasopressor (n=60) | 1 or more vasopressor doses (n=32) | P value |
| Preoperative MAP | 85 (±19) | 85 (±127) | 0.718 |
| Base deficit on initial VBG/ABG | −0.3 (IQR 5) | −3 (IQR 22) | 0.02 |
| Transfused, n (%) | 12 (20) | 8 (40) | 0.580 |
| Transfusion, number of units of product | 0 (±24) | 0 (±15) | 0.605 |
| EBL | 100 (±325) | 200 (±249) | 0.230 |
| EKG changes requiring treatment | 0 | 3 (9.4) | 0.016 |
| 20% change in MAP | 33 (55) | 26 (81) | 0.012 |
| MAP change requiring treatment, n (%) | 14 (23) | 23 (71) | <0.001 |
ABG, arterial blood gas; EBL, estimated blood loss; EKG, electrocardiogram; MAP, mean arterial pressure; VBG, venous blood gas.