Figure 4: Intra- and inter-observer variability for pulmonary valve pressure difference (PVPG) measurements by the pulmonary valve premature opening method.
From: A Simple Method for Noninvasive Quantification of Pressure Gradient Across the Pulmonary Valve
Linear regression analysis showed excellent correlation and Bland-Altman analysis showed very good agreement between measurements taken by the same observer (A,C) and by two independent observers (B,D).
