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MRI in patients with a prosthetic heart valve, annuloplasty ring or mitra clip; Guideline in the Netherlands
Mark BM Hofman1, Carla Kloeze2, Bastiaan J van Nierop3, Sara H Muller4, Joost PA Kuijer1, Kristie Venhorst5, Cristina Lavini6, Mette K Stam7, Carola van Pul8, Wouter Teeuwisse9, Marco JW Gotte10, Peter Kappert11, Evie EM Kolsteren5, and Marinette van der Graaf12
1Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands, 2Catharina Hospital, Eindhoven, Netherlands, 3Radiology and Nuclear Medicine, University Medical Centre Utrecht, Utrecht, Netherlands, 4Antoni van Leeuwenhoek Hospital, Amsterdam, Netherlands, 5Knowledge Institute Medical Specialists, Utrecht, Netherlands, 6Radiology and Nuclear Medicine, Amsterdam UMC location AMC, Amsterdam, Netherlands, 7Radiology, LUMC, Leiden, Netherlands, 8Maxima Medical Centre, Eindhoven, Netherlands, 9CJ Gorter Center for High Field MRI, LUMC, Leiden, Netherlands, 10Cardiology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands, 11Radiology, UMCG, Groningen, Netherlands, 12Imaging, Radboud UMC, Nijmegen, Netherlands
Can a patient with a prosthetic heart valve undergo MRI? The Dutch Association of Medical Specialists (FMS) wrote a guideline. The recommendation: scan the patient with an 1.5T or 3T whole body MRI system with a horizontal closed bore superconducting magnet without further restrictions.
Figure 3: Measured temperature increase compared to reference of an implant in a phantom of gel (Δ), water (o), or air (X) in the literature (unknown SAR value on the right). The symbol size is proportional to the number of values reported.
Figure 1: Number of implant types for which a certain gradient limit is set by the manufacturer (A) and number a certain SAR limit is set by the manufacturer (B), from MagResoure.