Table 1 Effect of preload (VLoad) and afterload (PLoad) interventions on the slope (Ees) and goodness of fit (r2) of the ESPVR derived from single linear regression (lin) and two phases of bilinear (bilin1, bilin2)) regression.

From: Non-linearity of end-systolic pressure–volume relation in afterload increases is caused by an overlay of shortening deactivation and the Frank–Starling mechanism

 

Type of regression

lin

bilin1

bilin2

Mean

SD

Mean

SD

Mean

SD

Ees

VLoad

1.21

0.51

1.44*

1.19

1.06*#

0.53

PLoad

2.28$

0.80

3.36*$

1.49

1.54*#$

0.65

r2

VLoad

0.974

0.021

0.976

0.030

0.975

0.060

PLoad

0.929$

0.068

0.960*

0.055

0.943$

0.094

  1. The means and standard deviations (SD) are shown (*p < 0.05 vs. lin; #p < 0.05 vs. bilin1, $p < 0.05 vs. VLoad).
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