Cardiac Magnetic Resonance Imaging (CMR)

A cardiac MRI (Magnetic Resonance Imaging of the heart) is a non-invasive imaging test that uses powerful magnets and radio waves to create detailed images of your heart and surrounding blood vessels. It provides critical information about heart structure, function, and tissue health without using radiation.

A cardiac MRI is often recommended to:

• Evaluate heart muscle damage after a heart attack
• Diagnose cardiomyopathies (heart muscle diseases)
• Assess congenital heart defects
• Detect inflammation or scarring in the heart (myocarditis or fibrosis)
• Guide treatment for arrhythmias, heart failure, or valve disease

Unlike echocardiograms or CT scans, cardiac MRI provides high-resolution, 3D images of the heart’s anatomy and tissue composition. It is especially useful for characterizing heart muscle, detecting inflammation or scar tissue, and quantifying heart function with high precision.

Yes, cardiac MRI is considered very safe. It does not involve ionizing radiation. However, it may not be suitable for patients with certain implanted devices (like older pacemakers or defibrillators). Our team will carefully review your medical history to ensure MRI safety.

In many cases, yes. A special contrast agent called gadolinium may be used to enhance the images and detect scar tissue or inflammation. It is generally safe and well-tolerated. Patients with severe kidney disease may require an alternative approach.

You should:

• Avoid caffeine for 12–24 hours before the scan (especially if stress testing is involved)
• Inform your provider if you have metal implants or a history of kidney problems
• Continue most medications unless instructed otherwise
• Wear comfortable clothing with no metal

Most cardiac MRI exams take between 45 minutes to 1 hour, depending on the complexity of the study. Some advanced scans, like stress cardiac MRI or perfusion imaging, may take slightly longer.

Cardiac MRI is painless. You will lie still in the MRI scanner, and you may hear loud tapping or thumping sounds during the exam. You’ll be given headphones or earplugs and may be asked to hold your breath briefly for clearer images.

Yes, cardiac MRI is typically covered by most insurance plans when medically necessary. Our team at CardiaSpace will help verify your benefits and obtain prior authorization if needed.

CardiaSpace partners with advanced imaging centers and hospitals across the country to provide expert cardiac MRI interpretation. Contact us to schedule your scan or to refer a patient.