Cardiac MRI

Cardiac MRI: What You Need to Know

Cardiac MRI (Magnetic Resonance Imaging of the heart) is a safe, non-invasive test that uses a powerful magnetic field and radio waves to create detailed images of your heart and blood vessels. It helps your doctor see how your heart is functioning and if there are any issues that need treatment.

What is a Cardiac MRI?

A cardiac MRI provides high-resolution pictures and videos of your heart in motion. It shows:

  • The structure of your heart (chambers, valves, muscles)

  • How well your heart is pumping

  • Blood flow and circulation

  • Areas of damage or scarring from previous heart problems

Unlike X-rays or CT scans, MRI doesn’t use radiation.

Who Might Need a Cardiac MRI?

Your doctor may recommend a cardiac MRI if you have:

  • Heart disease symptoms such as chest pain, shortness of breath, or palpitations

  • Cardiomyopathy (weakened or enlarged heart muscle)

  • Heart valve disease or abnormal heart sounds

  • Congenital heart disease (heart problems present from birth)

  • Pericarditis (inflammation around the heart)

  • Heart tumors or masses

  • Suspected heart damage after a heart attack

It’s also helpful for people who need a more detailed look at the heart when other tests like echocardiograms or stress tests aren’t conclusive.

Why Is It Done?

Cardiac MRI is used to:

  • Diagnose heart conditions more accurately

  • Plan or guide treatment (like surgery or medication)

  • Monitor the progress of a heart condition

  • Evaluate the effectiveness of treatments

It’s often used alongside other heart tests for a complete picture.

What to Expect During the Scan

  • The test usually takes 30–60 minutes.

  • You’ll lie on a table that slides into a tunnel-like MRI machine.

  • It’s painless, but the machine can be noisy – earplugs or headphones are usually provided.

  • Sometimes, a contrast dye (called gadolinium) is injected into a vein to improve image clarity. This is generally safe, even for most people with allergies.

  • You’ll be asked to hold your breath briefly at times to get clearer images.

Is Cardiac MRI Safe?

Yes, cardiac MRI is very safe for most people. However, let your doctor know if you:

  • Have a pacemaker, defibrillator, or other implants

  • Are claustrophobic (fear of small spaces)

  • Have kidney problems (if contrast dye is needed)

  • Are pregnant or think you might be

Ready to take the next step in understanding your heart health?


Contact London Heart Group today to book your cardiac MRI or speak with one of our specialists.
Call us on 0208 226 5888 or email enquiries@londonheartgroup.co.uk
Your heart deserves expert care.