Click on image to view larger version.

Figure 1 Relationship between valve effective orifice area (EOA) measured by a catheter using the maximal transvalvular pressure gradient (EOA_cath/max) and EOA measured by Doppler echocardiography (EOA_Dop). Open triangles and open squares represent in vitro (n = 172) and animal (n = 65) data, respectively. The solid and dotted lines represent the identity and regression lines, respectively. The regression line was constructed including the whole data set (in vitro and animal data). Several data points are superimposed.