Validation of methods for effective orifice area measurement of prosthetic valves by two-dimensional and Doppler echocardiography following transcatheter self-expanding aortic valve implantation.

Figure 1. The VenusA transcatheter artery valve produced by VenusMedtech is a self-expanding valve device that has been approved by the China Food and Drug Administration (Registration Number: 20173460680) and officially listed in China.

Figure 2. Measurement of the LVOTd. A zoomed LVOT in parasternal long-axis view. Schematic drawing of LVOTd measurements (A) and representative image of two-dimensional echocardiography (B).

Figure 3. Correlation between MG and EOAI.

Figure 4. Bland-Altman plots comparing the interobserver and intra-observer variability in measurements of the prosthetic self-expanding valve EOA when using different methods. EOA1 (blue dots) versus EOA2 (green dots): interobserver (A) and intra-observer (B) variability.