AI Article Synopsis
- Profiling the aortic root perpendicularly to the fluoroscopic image enhances the success rate of TAVR procedures, and this study investigates the impact of the C-arm's X-ray beam on TAVR device visibility.
- The study involved testing different sizes of Edwards Sapien XT valves in various field of views (FOV) to assess how their appearance changes when not centered in the fluoroscopic image.
- Results indicated that a 32 cm FOV significantly alters the valve's appearance more than a 22 cm FOV, requiring greater C-arm rotation to achieve a coaxial view, which could impact implantation depth.
Article Abstract
Introduction: Profiling the Aortic root perpendicular to the fluoroscopic image plane will achieve a more successful implant position for trans-catheter aortic valve replacement (TAVR). This study aimed to investigate whether the divergent nature of the X-ray beam from the C-arm altered the appearance of the TAVR device.
Methods: Under bench-top testing, a 23, 26 and 29 mm Edwards Sapien XT valve was positioned coaxially at the bottom of a fluoroscopic image utilising 22 and 32 cm fields of view (FOV). The table was then moved so that the valve was positioned at the top of the image. The valve's appearance was scored using a previously published three tier classification tool (excellent, satisfactory and poor) and quantified with measurements. The number of degrees of C-arm rotation that were required to bring the valve back to a coaxial appearance was recorded.
Results: When using the 32 cm FOV, the valve's appearance changes from excellent to satisfactory. When a 22 cm FOV was used, the change is less marked. More C-arm rotation is required to bring the appearance back to coaxial with the 32 cm FOV.
Conclusion: Not maintaining the valve in the centre of the image can distort the valves appearance. This has the potential to affect the final implantation depth.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4968560 | PMC |
| http://dx.doi.org/10.1002/jmrs.131 | DOI Listing |
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