The Relationship between Arterial and Central Venous Blood Gases Values in Patients Undergoing Mechanical Ventilation after Cardiac Surgery

292 adult patients admitted to the post-cardiac surgery ICU after elective cardiac surgery, mechanically ventilated, mean age 51.5, 64.4% male. Excluded: spontaneous breathing, irregular cardiac rhythm, re-admission to OR in the first 3 hours.

Measurement of ventilatory induced hemodynamic variations, specifically arterial pulse pressure variation (∆PP), during the first 3 hours of ICU admission

Patients with ∆PP ≤20% compared to those with ∆PP >20%

Correlation between ∆PP severity and perioperative factors including cardiac dysfunction, tamponade, hemorrhage rate, and fluid balancesurrogate