MRI in patients with implantable cardiac devices

Author(s): Jennifer Bryant, Amanda Murphy, Maria Liljeroth, Angela Darekar

Hospital: University Hospital Southampton NHS Foundation Trust

Reference: RAD Magazine, 42, 493, 21


Over the last decade there has been a considerable increase in both the number of patients referred for magnetic resonance imaging (MRI), and in the number of patients requiring implantable cardiac devices. An estimated 50-75% of patients with implanted cardiac devices may require an MRI during the lifetime of their device. Traditionally, cardiac pacemakers have been a contraindication for MRI due to the interaction between the magnetic field and the ferromagnetic components of the device, and radiofrequency field interactions with the device and leads. The advent of MR conditional implantable loop recorders (ILR), MR conditional pacemakers (PPM), and more recently MR conditional implanted cardioverter defibrillators (ICD), (Biotronik, Berlin, Germany; Medtronic, Inc., Minneapolis, MN; St Jude Medical, St Paul, MN) now permits the safe scanning of patients with these devices when performed under vendor specified conditions.

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