Table 2.

Suggested statements to use when describing risk during consent for patients with different functioning non-MR-conditional cardiac implantable electronic devices (CIED). Content modified with permission from Bhuva et al. [20]. These statements should be used in addition to discussing the MRI procedure, potential benefits and alternatives. This list is intended for common scenarios, and not as an exhaustive list. * ‘Mismatched’ CIEDs have MR-conditional generators and non-MR-conditional leads; or MR-conditional components from different manufacturers.

MRI Scanning Scenarios with Different CIEDs and Leads	Recommended risk statement to discuss with the patient. The MRI procedure, benefits and alternatives should also be discussed with the patient with the opportunity for them to have additional queries addressed by an appropriate clinician.
Intermediate and Higher risk scenarios (formal written consent required)
Non-MR-conditional CIED (No additional higher-risk scenarios)	You have been referred for a magnetic resonance imaging (MRI) scan. Your pacemaker/ defibrillator has not been formally approved by the manufacturer to undergo MRI scanning. After discussing the possible benefits, risks, and alternatives with your referring doctor, the decision to perform the MRI scan has been made. Serious complications related to MRI occur in < 1 in 2000 patients (∼0.05%) with these devices overall. These include, but are not limited to: - - Cardiac device damage - - Irregular/ abnormal heart rhythms - - Excessive tissue heating Emergency or urgent cardiac device replacement may be needed and will be performed if required.
Additional Intermediate and Higher risk scenarios (formal written consent required)
Non-MR-conditional CIED generators implanted before 2005	[in addition to above] Due to your device’s age, the risk may be slightly higher – with ∼2% risk of (generally temporary) program changes to “factory settings”.
Non-MR-conditional CIEDs implanted before 2000	[in addition to above] There is less evidence for scanning patients with old devices implanted before the year 2000. We know that the older devices are more sensitive to MRI and therefore the risk is likely to be higher.
Abandoned lead(s)	[in addition to above] Having a pacemaker or defibrillator lead which is not attached to a generator may result in heating at the lead tip in your heart, which could theoretically cause tissue damage. To date, there have been no reported problems in patients being scanned with these leads, although the number of these patients is relatively small. We would ask that you inform staff immediately if you feel any discomfort.