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Figure 2 (A) Linear regression between Doppler estimates and catheter measurements of pulmonary capillary wedge pressure (Pw). (B) Bland-Altman analysis of agreement between the estimated and measured Pw. (The middle solid line indicates the average difference between the two methods, whereas the outer dashed lines represent 2 SD or the 95% limits of agreement.) Circles = test population; Squares = training population.
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