Radiation Exposure and Contrast Agent Reduction During Transcatheter Aortic Valve Implantation: An Ongoing Experience.

Objectives: To determine the patient radiation exposure and contrast agent variation during transcatheter aortic valve implantation (TAVI) procedures resulting from technological improvements.

Methods: TAVI procedures from January 2008 to July 2015 were analyzed in three different time periods: 1st period, when the angiography was equipped with an image intensifier technology; 2nd period, starting with the installation of a new angiography system with flat-panel detector (FPD) technology; and 3rd period, starting with the systematic use of preprocedural multidetector computed tomography (MDCT) to individualize optimal fluoroscopic projections for the aortic prosthesis implantation.

Results: Significant differences were found in contrast volume (198 ± 99 mL vs 139 ± 74 mL; P<.