Fig. 4From: Three-dimensional transthoracic echocardiographic evaluation of tricuspid regurgitation severity using proximal isovelocity surface area: comparison with volumetric methodBland-Altman plots showing unacceptable agreement but negligible systematic bias between 3D PISA EROA and 3D Rvol EROA PISA in total patient population (a), primary TR group (b) and secondary TR group (c)Back to article page