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Doctor insights on: Why Is It Unsafe For Someone With A Pacemaker To Have An Mri Scan

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Dr. Sanjiv Kaul
5 doctors shared insights

Mri (Definition)

Mri or magnetic resonance imaging is one of the more recently developed imaging modalities available to physicians. It uses powerful magnets to generate images. There is no ionizing radiation which is a major advantage over many other modalities. Mri is the best imaging exam that we have for most soft tissue and joint related problems. There are radiologists ...Read more


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

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

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Is it okay for someone who has a metal knee replacement and to have an mri?

Is it okay for someone who has a metal knee replacement and to have an mri?

Yes: An MRI study can be performed on any area of the body with today's knee replacements. There should be no problems for most areas of the body. However, for the knee that has had this surgery, the metal will create artifacts and distortion of the images, and limit the evaluation. A scan of this knee may or may not be helpful, but you cannot tell without performing the scan. Discuss with your Doctor. ...Read more

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Are mris or cat scans better for migraines? I have been having migraines for some time now and want to get it looked into, but i was wondering whether an MRI or a cat scan is better for that. Or is there an even better test to diagnose what is causing he

Are mris or cat scans better for migraines? I have been having migraines for some time now and want to get it looked into, but i was wondering whether an MRI or a cat scan is better for that.  Or is there an even better test to diagnose what is causing he

Use can vary: Most pts who suffer migraine and have normal neurological exams do not need MRI or cat, but of the two, the MRI is far better regarding brain details and resolution, and may show a small vascular malformation that the cat could miss. Sometimes, headaches are due to problems with venous sinuses and MRI also better. If looking for aneurysm, mra or ct angio approaches are best. ...Read more

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Is it possible for you to have an MRI of the brain if you have a pacemaker?

Is it possible for you to have an MRI of the brain if you have a pacemaker?

MRI: Pacemakers make MRI problematic because of their metal content. It is possible to have an MRI of the brain if necessary though safer with the specific pacers make to be MRI resistant. ...Read more

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What can MRI w/contrast tell you about a 1cm complex kidney cyst that an ultrasound can't? Is it worth the risk for child who would need sedation?

What can MRI w/contrast tell you about a 1cm complex kidney cyst that an ultrasound can't? Is it worth the risk for child who would need sedation?

Much more: The MRI provides much more detail to help the nephrologist determine the correct diagnosis and then appropriate treatment plan (or lack of need for treatment due to benign). Yes, it is worth the risk of sedation. I would preface that statement with i would prefer the sedation in a childrens hospital. ...Read more

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Is it actually healthy for an elderly person with diabetes to have a CT scan?

Is it actually healthy for an elderly person with diabetes to have a CT scan?

Yes: In general, a ct scan can be safely administered to diabetic and or elderly patients. However, if intravenous contrast is going to be administered, at a minimum kidney function should be evaluated, certain medications should be temporarily discontinued, and certain precautions should be taken. ...Read more

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How common is it to have a CT scan with contrast and not find an appendix?

How common is it to have a CT scan with contrast and not find an appendix?

Uncommon: People that have appendicitis are more frequently having CT scans to dx this problem. It is not common to not find an appendix especially if there is one present. There are people that are born without appendix but is rare. ...Read more

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Is it possible for an MRI or and X-ray to show if someone has cancer in their foot?

Is it possible for an MRI or and X-ray to show if someone has cancer in their foot?

Not definitively: Advanced imaging can reveal abnormalities in the bone and soft tissue. The gold standard in identifying if the abnormality is in fact a cancer, is to take a surgical biopsy... which then needs to be reviewed by a pathologist for definitive diagnosis. ...Read more

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Is it dangerious to have an infant CT scan? Is there any risk to an infant if she has a CT scan done?

Safetyfirst: If your infant needs a ct scan make sure it is done at a pediatric center which deals with children exclusively. They know how much radiation an infant may be exposed to safely. Their machines are also calibrated for children. ...Read more

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With a mammogram is it normal to have to have an ultrasound? I cannot afford it.

With a mammogram is it normal to have to have an ultrasound? I cannot afford it.

Sometimes: Not all radiographic testing is 100% diagnostic. Sometimes you need additional testing to see areas of the breast more clearly. I would discuss this with your physician if they fell that the ultrasound is necessary. If it was me, i would want everything possible to do a full evaluation. ...Read more

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Is there a legitimate reason to order an X-ray for shoulder injury when an MRI has already been done?

Is there a legitimate reason to order an X-ray for shoulder injury when an MRI has already been done?

Xrays of shoulder jt: After shoulder injury, MRI will pick up soft tissue injury but it may miss fracture. Xrays are often done to rule out fracture of bones which make up the shoulder joint. ...Read more

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Is it safe for a man with an already bad heart to have cardio version performed?

Is it safe for a man with an already bad heart to have cardio version performed?

Yes, if recommended: by a doctor for an abnormal heart rhythm then it may be deemed necessary to keep you from heart failure or worse. At your age of 74, I am guessing that the doctor is trying to keep you from having to take medicines for the rest of your life to control the rhythm, given that you are probably already on several other medicines. Good luck to you! ...Read more

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Can a CT scan show if a male is able to have children if there had been an injury to the testicles?

No: The ct scan will reveal gross damage to the testes, but will not answer the fertility question. This will be best tested by examining for sperm motility and abnormalities. ...Read more

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Is it possible to have an Echocardiogram while I have a loop recorder implanted??

Is it possible to have an Echocardiogram while I have a loop recorder implanted??

Loop recorder: There should be no problem having an echocardiogram while a loop recorder is in place unless the recorder is placed so as to interfere with the study. ...Read more

Dr. Hirenkumar Italia
2 doctors shared insights

Pacemaker (Definition)

A pacemaker is a device which sends electrical signals to the heart triggering heartbeats when needed. There are many ways to implant and configure a pacemaker; it may beat the top chambers (atria), lower chambers (ventricles) or both. Some systems stimulate both the left and right ventricles together. Pacemakers generally treat abnormally slow heart rhythms and certain ...Read more