Figure 3From: Bench-to-bedside review: Functional hemodynamics during surgery - should it be used for all high-risk cases?Principles for calculation of dynamic parameters based on the hemodynamic effects of a mechanical breath. (a) Systolic pressure variation. (b) Pulse pressure variation. PPmax, maximum pulse pressure; PPmin, minimum pulse pressure. (c) Stroke volume variation. SVmax, maximum stroke volume; SVmin, minimum stroke volume.Back to article page