Figure 7From: Using heart-lung interactions to assess fluid responsiveness during mechanical ventilationRelationship between the respiratory changes in pulse pressure on ZEEP (y-axis) and the PEEP-induced changes in cardiac index (x-axis) in 14 ventilated patients with acute lung injury. The higher ΔPP is on ZEEP, the more marked the decrease in cardiac index induced by PEEP. Adapted with permission [43].Back to article page