Abstract 20259: Rapid Prototyping of the Aortic Root in Severe Aortic Stenosis for Pre-TAVR Planning

Introduction: Rapid prototyping 3D printing technique has emerged as a promising tool for device testing and treatment planning in cardiovascular surgery and intervention. We tested the feasibility of printing patient-specific and material-specific aortic valves in 3D, and evaluated the post-TAVR annular strain distribution on the printed model in-vitro. Methods: We used 2 pre-TAVR CT scans, one had severe aortic stenosis (AS) with mild calcification, and the other had severe AS with severe calcification which extended into the LVOT; and one CTA scan that had a normal aortic valve (AV). The perimeter-derived annular diameters were all within the range of 21-22 mm. We reconstructed the patient-specific root models at peak AV opening from CT, and used an Object350 Connex polyjet printer (Stratasys, Rehovot Israel) to print them in 3D (Fig. A1-3) using specific printing materials that resembled the mechanical properties of the arterial wall, the valvular leaflets, and the calcified lesions (materials used: T...