Cardiac MRI

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Cardiac magnetic resonance imaging is a safe, noninvasive test that uses radio waves and a strong magnetic field rather than X-rays to generate clear and detailed pictures of the cardiovascular system. These still and moving images provide information about the structure and function of the heart and major vessels and are used to diagnose heart conditions and determine treatment courses for a wide range of cardiovascular diseases, such as coronary heart disease, heart failure, heart valve problems, congenital heart defects, cardiac tumors and damage caused by a heart attack.

Cardiac MRI is a noninvasive procedure, which means no instruments are inserted into the body during the test. Cardiac MRI images are produced without exposure to radiation, invasive techniques or IV dye, which are commonly used for other diagnostic tests. Gadolinium contrast, a form of dye not related to X-ray dye, may be used, however, for certain tests.

Preparing For a Cardiac MRI

Cardiac MRI is a safe procedure, but certain precautions must be followed. Be sure to fill out the screening form completely and accurately. The MRI unit has a strong magnetic field that pulls on objects in or on the body that contain iron. Dress comfortably in clothes that have little or no metal on them. Leave jewelry and credit cards at home. It is not necessary to have rings cut off. Lockers are provided for personal items during the procedure. Inform the staff before the scan if you have:

• A pacemaker
• An implanted defibrillator
• Tattoos
• Body piercings
• Metal implants (surgically or accidentally)

Also, inform the staff if you are pregnant.

Medication and/or eating restrictions may be required, depending on the test ordered. Refer to your patient instruction sheet for detailed information on how to prepare for your cardiac MRI.

Bring your insurance cards to your appointment. Prior to the exam, the physician’s office ordering the procedure will assist with pre-certification. If you are unsure whether cardiac MRI is a covered benefit under your insurance plan, please contact your insurance company directly.

During the Exam

• Exam times vary depending on the test performed, but are typically 30 to 90 minutes.
• Patients must lie still on their back during the scan and may be asked to hold their breath for short periods of time.
• Patients who feel confined or claustrophobic may be given a sedative to calm their nerves. This practice, however, may reduce image quality.
• IV lines will be placed in one or both arms of patients who need contrast for a stress test.
• Patients may have a cool sensation during the injection or may experience a warming feeling in the area tested. This is normal, but tell the staff if it bothers you.
• Special cardiac MRI equipment may be used during the test to administer medications and/or to monitor blood pressure, heart rate and heart rhythm.
• The loud tapping or knocking noises heard during certain phases of the scan may be disturbing, but they are normal.