1. Volume 126, Issue 4, Pages 1313-1317 (October 2004)
New Formula for Predicting Mean Pulmonary Artery Pressure Using Systolic Pulmonary Artery Pressure 
Denis Chemla, MD, Vincent Castelain, MD, Marc Humbert, MD, Jean-Louis Hébert, MD, Gérald Simonneau, MD, Yves Lecarpentier, MD, Philippe Hervé, MD 
CHEST 
Volume 126, Issue 4, Pages (October 2004)
DOI: /chest
Copyright © 2004 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Linear relationship between MPAP and SPAP in the test sample (MPAP = 0.61 SPAP + 2 mm Hg; 16 patients; r2 = 0,979; p < 0.001). ▪ = control subjects; □ = patients with venous PH; • = patients with CPTE; ○ = patients with PPH.
CHEST  , DOI: ( /chest )
Copyright © 2004 The American College of Chest Physicians Terms and Conditions

3. Figure 2
Lack of influence of the true MPAP on the bias (ie, predicted MPAP − true MPAP) in the validation sample (15 patients; r2 = 0.07; p = 0.65). MPAP was predicted according to the following formula: MPAP = 0.61 SPAP + 2 mm Hg.
CHEST  , DOI: ( /chest )
Copyright © 2004 The American College of Chest Physicians Terms and Conditions