Why is it unsafe for someone with a pacemaker to have an MRI scan?

Most metals are bad. In the presence of the magnetic field of an mri, many metals will generate an electric current that can cause severe burns. This would include the metal leads of the pace maker. If you have metal in your body, some other imaging technology is used instead of mri.

Related Questions

Can you please tell me why it'sunsafe for a patient with a pacemaker to have an MRI scan?

Arrhythmia. Pacemakers work by electrical impulses and are affected by strong electromagnetic fields. Mris work by strong electromagnetic fields, so having an MRI with an implanted pacer can be life-threatening. There is also a risk of heating of the wires when subjected to the MRI field. Read more...