Long awaited results of the MagnaSafe study regarding the safety of MRIs in patients with implantable devices were published in February. The MagnaSafe study established a multi-center prospective registry for patients undergoing MRI scans despite their having an implanted device not deemed safe for MRI scanning by the FDA.
Two posters presented at this weekend’s Heart Rhythm Society meeting in Chicago show that patients who have abandoned pacemaker or ICD leads may safely undergo MRI exams.
These posters follow the earlier MagnaSafe study which demonstrated the safety of MRI for patients with pacemakers and ICDs, but which excluded patients with abandoned leads from the findings.
The first, by researchers at Mayo Clinic, included 57 patients with 63 abandoned leads who underwent 70 MRI exams in a 1.5 Tesla machine. The authors saw no clinical problems and no device malfunction following the scans.
The researchers also monitored blood troponin levels in 35 of the patients following the scans and did not see any elevation which could indicate distress to the heart from the scan.
The second poster, from the University of Pennsylvania, involved 24 patients with abandoned leads who underwent 34 MRI exams. The results of this study also failed to demonstrate any clinical problems or patient discomfort resulting from the MRI scans.
With any luck, everyone will soon be able to obtain an MRI and will not be denied due to any kind of implantable cardiac device.
For an account of my personal experiences seeking MRI with an ICD, read this.
The long awaited results from the Magna-Safe study were published today in the New England Journal of Medicine, and it was good news for pacer and implantable cardioverter–defibrillator (ICD) patients! When proper precautions have been taken, MRIs were found to be safe in patients implanted with certain older pacemakers or ICDs.
In order to study the safety of scanning these patients, doctors set up a prospective registry for patients undergoing MRI in scanners with a magnetic field strength of 1.5 tesla who were scanned despite having a non-MR conditional device (i.e. a device which had not been deemed safe for MRI scanning by the FDA).
MRIs were performed on 1000 patients with pacemakers and 500 patients with ICDs and the results of the study showed that as long as appropriate patient selection and safety protocols were followed, patients had no problems with the MRI scans.
This is indeed good news for those of us with older devices who may be in need of MRI scans. To read about my own experiences and investigation of this issue, read my previous blog entry YES WE SCAN! ICDs and MRIs.