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Cardiac Magnetic Resonance Imaging (MRI)

Health Care Providers in Georgetown, Texas

What is a cardiac magnetic resonance imaging (MRI) test?
Cardiac MRI is a noninvasive way of evaluating the heart’s structure and function. Cardiac MRI is an imaging method that uses powerful magnets and radio waves to create pictures of the heart. It doesn’t use radiation (X-rays).

Single MRI images are called slices. The images can be stored on a computer or printed on film. One exam produces dozens or sometimes hundreds of images.

What should I expect during the cardiac MRI exam?
You will be positioned on the examination table and several devices may be placed on or around your chest to help with the imaging acquisition.
For example:

Devices that contain coils capable of sending/receiving radio waves will be placed around your chest.
Electrocardiogram (ECG) leads may be placed on your chest.
A respiratory gating belt that helps a computer track your breathing rate may be placed around your upper abdomen.
If a contrast material is used, a nurse or technologist will insert an intravenous (IV) line into a vein in your hand or arm.

You will be moved into the magnet of the MRI unit, and the technologist will leave the room while the MRI examination is performed. The technologist will still be able to see, hear, and talk with you using a two-way intercom during the exam.

For some studies, you may be asked to hold your breath while the images are recorded. You will hear tapping or thumping sounds when the coils that generate the radiofrequency pulses are activated. You can relax between imaging sequences, but you will be asked to remain as still as possible during the exam.

When the examination is completed, you may be asked to wait until the technologist or radiologist makes sure no additional views are needed.

The entire examination typically takes 60 to 90 minutes to complete. This test requires that you have a referral from your cardiologist or from your primary care physician. If the test is normal, you will have the results within four to five working days. You will be notified immediately if any problems are found.

Patient Experience and Procedure Protocols
As the exam begins, the table slides into the large, tunnel-like magnet of the MRI unit, reflecting the advanced capabilities commonly offered by health care providers in Georgetown, Texas. While the technologist moves to a separate control room for safety, they can see, hear, and speak with you at all times through a two-way intercom. You aren’t alone during the process—you can communicate any concerns immediately. The most noticeable part of the experience is the sound; as the magnetic coils activate to generate radiofrequency pulses, you will hear a series of loud tapping or thumping noises. Many facilities provide earplugs or headphones to help dampen this sound.

For some parts of the study, the technologist will ask you to hold your breath for a few seconds at a time. This is crucial because even the slight movement of your chest from breathing can blur the high-precision images. Between these sequences, you are encouraged to relax, but staying as still as possible throughout the 60 to 90-minute exam is key to getting the best results. Once the scan is finished, a radiologist or technologist will check the images to ensure every angle was captured before you head home.

Frequently Asked Questions

How do I prepare for a heart MRI scan?

Usually, you can eat and take your medications as normal unless told otherwise. The most important preparation is removing all metal from your body. This includes jewelry, watches, piercings, and even certain types of makeup or hair products that may contain metallic fibers. You will typically change into a hospital gown to ensure no metal zippers or buttons interfere with the magnet.

Can I have an MRI if I have a pacemaker or metal implants?

It depends on the specific device. While many modern pacemakers and implants are “MRI-conditional” (safe under certain settings), some older models are not. You must inform your imaging team about any internal devices, stents, or shrapnel well in advance so they can verify if the procedure is safe for you.

Does the MRI machine feel claustrophobic?

Some people feel a bit nervous about the enclosed space of the MRI tunnel. If you have a history of claustrophobia, talk to your doctor beforehand. They may be able to offer a mild sedative to help you stay calm, or you can use the intercom to stay in constant contact with the technologist.

What does the contrast dye feel like?

The contrast material used in MRI (usually gadolinium) is different from the iodine-based dye used in CT scans. Most people don’t feel anything at all, though some might notice a brief cooling sensation at the IV site. It is very rare to have an allergic reaction to MRI contrast.

Why is the MRI machine so loud?

The loud thumping or clicking sounds are perfectly normal. They are caused by the “gradient coils” inside the machine turning on and off very quickly to create the magnetic field changes needed for the images. You will be given hearing protection to make the experience more comfortable.

How soon can I go back to my daily activities?

Immediately! A cardiac MRI is a non-invasive procedure with no recovery time. Unless you were given a sedative for claustrophobia, you are free to drive yourself home and return to work or exercise right after the appointment.

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