A small loop makes a big difference: Modifying trajectory of epicardial leads substantially reduces RF heating of CIEDs in children during 1.5T MRI
Fuchang Jiang1, Bhumi Bhusal2, Bach Nguyen2, Michael Monge3, Gregory Webster4, Daniel Kim2, Giorgio Bonmassar5, Andrada R. Popsecu6, and Laleh Golestanirad1,2
1Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL, United States, 2Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States, 3Division of Cardiovascular-Thoracic Surgery, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, United States, 4Division of Cardiology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, United States, 5A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, MA, United States, 6Division of Medical Imaging, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL, United States
Infants with congenital heart defects, inherited arrhythmia syndromes, and congenital disorders of cardiac conduction often require cardiac implantable electronic devices (CIEDs). Some infants receive a CIED within hours, or even minutes, of birth. The presence of an epicardial CIED is a relative contraindication for cardiac magnetic resonance imaging (MRI) due to the risk of RF heating. We present results of phantom experiments and electromagnetic simulations showing that a simple surgical modification in the trajectory of epicardial leads can reduce RF heating more than 40-fold during MRI at 1.5 T.
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