Conclusion
In conclusion, a wide array of devices is currently available falling into the broad category of SE or BE valves, with a shift of the factors that dictate prosthesis selection – sheath and device dimensions in the early days to factors such as frame design, radial force and the anatomical characteristics of the annulus and root in the present era. Results from the CHOICE trial have provided some insights into short-term outcomes after SE and BE valve implantations; but as newer devices become available and indications for TAVI expand, long-term outcome comparative trials are needed to conclusively dictate device selection. Recently-launched technologies and devices are in their initial phases, and as more scientific data focusing on individual patient characteristics become available, indications for TAVI may expand to intermediate-risk and other population subsets of aortic valve disease.