Hi, Thanks for writing in. There is published literature regarding MRI safety, which mostly states that patients with sternal wires can be safely scanned. The same literature also states that “in patients with retained epicardial pacing wires following cardiac surgery, there are no reports of adverse events or arrhythmias during Cardiac MRI up to 1.5T with conventional pulse sequences. There is a small artefact but this is localised and rarely interferes with image analysis. No adverse effect is noted on doing brain MRI in the above scenario to the best of my knowledge. However the presence of a pacemaker is an absolute contraindication unless specified by the manufacturer.