Original ArticleUse of a Nonmetallic Guide Wire for Magnetic Resonance-Guided Coronary Artery CatheterizationBuecker, Arno MD*; Spuentrup, Elmar MD*; Schmitz-Rode, Thomas MD*; Kinzel, Sylvia VD†; Pfeffer, Jochen MD*; Hohl, Christian MD*; van Vaals, Joop J. PhD‡; Günther, Rolf W. MD*Author Information From the *Clinic of Diagnostic Radiology and †Department of Laboratory Animal Science, University Hospital, Aachen, Germany; and ‡Philips Medical Systems, Best, The Netherlands. Received February 16, 2004 and accepted for publication, after revision, June 18, 2004. Reprints: Arno Buecker, MD, Clinic of Diagnostic Radiology, Pauwelsstr. 30, D-52057 Aachen, Germany. E-mail: [email protected] Investigative Radiology: November 2004 - Volume 39 - Issue 11 - p 656-660 Buy Abstract Rationale and Objectives: Metallic guide wires can be subject to substantial heating when used in the magnetic resonance (MR) environment. Therefore, animal experiments were performed to test the feasibility of a non-metallic and MR-safe guide wire with passive markers for catheterization of coronary arteries under MR guidance. Materials and Methods: Self-made guide wires consisting of a resin-microparticle compound covered by polytetrafluoroethylene were used to catheterize both coronary arteries of swine together with a non-braided catheter. Time needed for catheterization was recorded. Results: MR-guided coronary artery catheterization with passive visualization of a self-made non-metallic guide wire is possible. In average 141 seconds (SD 68) were needed to manipulate the guide wire together with a catheter from the carotid artery into the left or right coronary artery ostium. Conclusion: Standard nitinol guide wires have to be considered unsafe for MR-guided interventions due to possible heating of electrical conducting structures in the MR environment. Passive visualization techniques allow MR-guided catheterization of small arteries like coronaries. However, there is the substantial disadvantage of obscuring the underlying anatomy of small vessels by the passive markers needed for real-time MR guidance. © 2004 Lippincott Williams & Wilkins, Inc.