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Fig. 1 | Critical Care

Fig. 1

From: Performance comparison of ventricular and arterial dP/dtmax for assessing left ventricular systolic function during different experimental loading and contractile conditions

Fig. 1

Example of the left ventricular pressure-volume (PV) analysis during an inferior vena cava occlusion. Two-dimensional (left) and 3d representation (right) of the left ventricular PV loops during a transient inferior vena cava (IVC) occlusion. Red points represent the maximal elastance for each cardiac cycle. The slope of these maximum elastance values obtained during a transient decrease in preload represents the left ventricle (LV) end-systolic elastance (Ees, a marker of LV contractility). The outlined PV loops represent the cardiac cycles obtained just before the IVC during an end-expiratory pause for measuring end-systolic pressure and effective arterial elastance (Ea, a net measure of LV afterload). Dashed line connects the maximal elastance during the IVC maneuver and represents the end-systolic elastance (Ees). The dotted line connects the end-systolic pressure with the stroke volume (defined by the width of the PV loop: end-diastolic volume minus end-systolic volume) representing the effective arterial elastance (Ea)

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