Echocardiographic Measures of Diastolic Function Are Preload Dependent during Triggered Positive Pressure Ventilation: A Controlled Crossover Study in Healthy Subjects

Figure 4

Effects of alternating positioning and varying positive pressure ventilation on cardiac output (CO). A clear association between positioning and CO was observed supporting the efficacy of our model of preload variation with positioning (𝑃<0.001). Ψ: 𝑃<0.005 and 𝜀: 𝑃<0.05 for independence of positioning at individual ventilator settings. Data are presented as median and upper interquartile range.