Please click here to obtain permission to reproduce this image.
Click on image to view larger version.
Figure 8 Top panel: Relationship between single-beat Mw (SBMw) estimates and multibeat Mw measurements in Group II. Multibeat data were obtained during vena caval occlusions performed before and during aortic constriction and calcium infusion. The relationships were not significantly different from the line of identity, whether based on individual measured k values (SBMw,measured) or calculated assuming k to be constant at 0.7 (SBMw,calculated). Bottom panel: Corresponding relationships between single-beat elastance (SBEes) or PWRmax/EDV2 and multibeat elastance (Ees). Both single-beat indexes correlated very poorly with multibeat Ees. Mw = slope of the PRSW relationship; PWRmax/EDV2 = maximum left ventricular power divided by the square of end-diastolic volume.
|
