Magnetic resonance imaging (MRI) creates images of organs and tissues in your body using magnetic fields and radiofrequency waves. A cardiac MRI focuses on the heart and attached blood vessels. It allows measurement of the volume and thickness of the heart's chambers and walls. An MRI also measures blood flow through the heart chambers and across the valves and can identify inflammation or blockages in the blood vessels. If a contrast material is used, the MRI can measure scarring in the heart muscle. Measurements made with an MRI are generally more accurate than those made with echocardiograms.
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Mayo Clinic. (2019, August 3). MRI. MRI- Mayo Clinic. Retrieved October 16, 2020, from https://www.mayoclinic.org/tests-procedures/mri/about/pac-20384768