Saturday, August 22, 2015

Fwd: [MP4MS] MRI safe pacers

 
=Basically there newer models of pacemakers that are MRI conditional given less use of ferromagnetic materials and more sophisticated circuitry. 

See this link for a list of those that are MRI conditional vs MRI unsafe (http://www.mrisafety.com/TheList_search.asp?s_list_description=pacemaker&s_ANYwords=&s_object_category=)   

If the patient has a MR conditional model they can undergo a 1.5 T MRI as long as set of very specific procedures are carried out. These procedures vary from manufacturer to manufacturer (most requiring informed consent and the involvement of cardiology assessing patient/pacer before and after the scan) and are available from the manufacturer's website. There are additional safeguards at each institution and in general everyone is very hesitant to do scans in people with pacers but things are changing.  While in the literature with different models patients have undergone scanning safely at 3T I don't believe that any of the models are technically approved at that magnet strength and we don't do them at 3T here.

Here is a nice overview of the issue from mrisafety.com, which is the MR bible on what is allowed into a magnet ( http://www.mrisafety.com/SafetyInfov.asp?SafetyInfoID=167)

 

 

From: seMSc@googlegroups.com [mailto:seMSc@googlegroups.com]
Sent: Tuesday, August 04, 2015 8:30 AM
To: seMSc@googlegroups.com
Subject: [MP4MS] MRI safe pacers

 

 

 

 to group:

 

What is the scoop on MRI safe pacemaker defibrillators?   A patient (daughter, an ER nurse)  told me she got a device that was not MRI safe due to "3 major companies" not offering MRI safe devices except in research, and considering but not getting MRI safe wires in case the safe pacemakers come out later and she changed the device.  Is there a particular company, brand, type of MRI machine that is compatible?    Also, she was told with this device she could get an MRI if absolutely needed if monitored apprpriately.  ???? Thank you.

 

Also, same patient, very interesting, has experienced repeated bouts of flash pulmonary edema/cardiogenic shock from which she recovers to a normal EF over time which may be an MS symptom ("neurocardunculus"). At one point wore a "temporary" life vest for months until improving, then was considered and declined for a cardiac transplant.  Cardiologist is stumped. At one point he thought it might be delayed event due to long ago novantrone, but recoveries and repetitiveness suggests otherwise. 

 

Daniel Jacobs, MD, FAAN

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