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Figure 3 (A) Linear regression (solid line) and 95% confidence intervals (dotted lines) comparing noninvasive left ventricular elastance at end-systole derived by single-beat technique (Ees(sb)) and invasive (multi-beat) left ventricular end-systolic elastance (Ees) at baseline for 43 subjects. (B) Bland-Altman plot of Ees(sb)-Ees difference versus mean value. Mean and 99% confidence interval of the mean difference is shown. (C and D) Same analysis as in A and B but including data after dobutamine stimulation, which expanded the range of Ees comparisons. The correlation between measurements is very good and falls along the line of identity.
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