question: Compared to no helium what was the result of Helium preconditioning (3 × 5 min of 70 % helium and 30 % oxygen) was applied before aortic cross clamping; postconditioning (15 min of helium) was applied before release of the aortic cross clamp. on Hemodynamic data?
context: Data are presented as mean ± SD; no significant differences were observed between groups