Fig. 1From: Estimating mean circulatory filling pressure in clinical practice: a systematic review comparing three bedside methods in the critically illThe venous return curve (a) combined with the cardiac output curve (b). The intersection of these two curves (c) is the working point of the circulation. The central venous pressure when venous return equals zero is the Pmcf (d). The slope of the VR is determined by the resistance to venous returnBack to article page