What is MRI?
MRI is an imaging test that uses a combination of magnetic fields and radiofrequency waves to obtain images of the body. In the case of the heart, it allows us to see its anatomy, global function, segmental movement alterations, valve function, calculate flows and volumes and characteristics of the heart tissues.
What are the drawbacks of the test?
The MRI can be somewhat uncomfortable since it lasts a long time (around 45 minutes) during which you have to stay in the same position. The space is relatively small so some people may feel claustrophobic, although modern systems are usually larger. In addition, the device makes noise, although headphones are provided to partially isolate it.
However, the drawbacks are minimal given the extensive information that the test provides.
Could a heart study be performed in an open MRI?
No, unfortunately open MRIs do not have enough power to obtain the images necessary for this type of study.
Does MRI use radiation?
No, in addition to the magnetic field, the waves used in this test are in the radio frequency range, that is, they are low energy waves (similar to the waves of radio devices) unlike the X-rays used in other magnetic fields. Radiology.
Should contrast be used in the test?
In most cases yes, since it is essential to see the characteristics of the heart muscle. In specific cases, depending on what is sought to be seen in the study (aorta dilation, anomalous circuits, valve study...) it may not be administered, renouncing the study of the aforementioned tissue.
However, MRI contrast, based on gadolinium, is safe, with a very low incidence of allergic reactions and can be administered without problem in patients with allergies to iodinated contrast.
Can I have the MRI if I have implants/devices?
In most cases yes, as long as they are not made of ferromagnetic materials (that are altered by magnets). Titanium bone prostheses, modern valve prostheses and coronary stents are compatible with the test. Likewise, modern implantable pacemakers/defibrillators are also compatible, although they require a configuration change prior to performing the test.
In any case, inform your doctor of any foreign body you carry. Likewise, the radiology technicians will ask you about it before starting the test.
How can I help obtain the images?
The most important thing is not to move and follow the breathing instructions. Most imaging requires you to take a breath, release it, and stay in that state for a few seconds.
By Dr. Alejandro Cebollada , specialist at UICAR