What is the largest potential risk from a non-ferrous leadless pacemaker during an MRI scan?

The largest potential risk from a non-ferrous leadless pacemaker during an MRI scan is malfunction. This is primarily due to the magnetic fields and radiofrequency energy used during the MRI process, which can interfere with the pacemaker's function. Non-ferrous leadless pacemakers are designed to be safe for use in MRI environments, but issues can still arise.

For example, the pacemaker may not maintain proper pacing, which can lead to inadequate heart rhythm regulation. It's crucial for individuals with leadless pacemakers to be assessed and monitored before and during an MRI to ensure that any electromagnetic interference does not compromise the device's functionality.

Understanding this risk is essential for the safety of patients with pacemakers when undergoing MRI procedures. Evaluation protocols often involve consulting with the device manufacturer and conducting pre-scan assessments to mitigate any potential malfunction risks.