New invasively measured mPAP are weighed against the newest determined cmPAP * Abbreviations of Dining table 1 use. Bland-Altman analysis of the calculated LCE. The mean difference for all equations was 0, the dashed lines represent the two-fold SD of the differences. a: The comparison of the computed cmPAP < 0.01 with the measured mPAP; the maximal difference is 12.2 mmHg. b: The comparison of the computed cmPAP < 0.005