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Abstract #0600

MRI-guided right heart catheterization using a commercial nitinol guidewire: Experience in 6 patients

Adrienne E Campbell-Washburn1, Toby Rogers1, Jaffar Khan1, Rajiv Ramasawmy1, Daniel A Herzka1, Elena K Grant1, Delaney McGuirt1, Jonathan R Mazal1, William H Schenke1, Laurie P Grant1, Annette M Stine1, and Robert J Lederman1

1National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States

We have performed MRI-guided right heart catheterization in patients with a commercial nitinol guidewire for the first time. MRI-guided cardiovascular interventions have been limited by the unavailability of an guidewire that is safe and visible. Here, we use real-time spiral gradient echo imaging to reduce RF-induced heating on a commercial nitinol 150cm Glidewire. The Glidewire was found to generate <0.2°C in the ASTM-2182 phantom in all configurations. With IRB approval, the guidewire catheterization was performed on six patients. Blood biomarkers remained normal and the reported clinical benefits were increased shaft conspicuity, increased shaft stiffness, and ability to track to chambers.

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