@lmclaugh Hi I didn't have a Medtronic so this may not apply. Mine was a Boston Scientific and was in planted in 2013. I have since had a heart transplant and it was removed but prior to the removal they tried an MRI and it was unsuccessful. Mine was a pacemaker with defibulator. The reflections we're too severe to get a good look at my heart which is what they were looking at. They did have a tech there from Boston Scientific and a cardiologist to shut it off and monitor me while it was off. I have heard tho that the newer pacemakers are capable of MRI so maybe yours is one of those. I'm not sure what the duel chamber is in reference to so I don't know if mine was. Mine was a 3 lead with defibulator is how I was told. If I can help with anything else please let me know.