We know that when you get a CT scan or experience other kinds of medical imaging, the staff taking the images needs to protect themselves by leaving the room. Think about when you need an x-ray at your dental office — they put that heavy layer of protection on you just for a picture of your mouth.

They do this because the ionizing radiation that is used to take the images is damaging to DNA and the tissue of living things, and a possible cause of cancer in the future. The cells in our bodies are very efficient at repairing this damage and medical staff use the lowest dosages possible, but what if you didn’t have to be exposed to this radiation in the first place?

Cardiac Magnetic Resonance Imaging (MRI) is a new technique offered at UPMC in North Central Pa. that offers a sophisticated way to characterize the structure and function of the heart and to diagnose a variety of heart conditions.
What is a Cardiac MRI?

Instead of using ionizing radiation, cardiac MRI uses radio waves, powerful magnets, and a computer to generate detailed images of blood vessels and the heart. This imaging test provides a non-invasive way to deliver quality images for your doctors to use for the diagnosis of various conditions.

You may need a cardiac MRI if you have:
– Previously had a heart attack
– Heart disease, or coronary artery disease
– Cardiomyopathy, or heart muscle disease
– Ventricular arrhythmia, or a heart rhythm disorder that originates in your ventricles
– Congenital heart defects, or heart problems present at birth
– Blood clots or tumors in your heart

The procedure of a cardiac MRI is typically painless and, on average, may take an hour in total. It begins with a patient lying on a table that slides into a tube-shaped machine. A sense of claustrophobia may be felt due the enclosed nature of the machine, but your health care team will ensure your comfort by providing soothing measures like playing music. An IV may also be used to administer medicine or a contrast material to help get a better picture of the heart.

It is critical to mention any metal implants or devices in your body as the strong magnetic field can interfere with them. It is also important to stay very still so that the images turn out clear and accurate.

Results

After your cardiac MRI, your results will either be normal or abnormal. Normal results mean that your heart chambers and valves are working properly, the amount of blood your heart pumps is normal, there is no extra fluid around your heart, and no tumors or blood clots are present. Abnormal results can vary depending on each patient’s specific condition.

The strong magnetic field does not produce any known harmful effects, and, if contrast material is used, there is a rare chance of an allergic reaction or an infection at the injection site.

Understanding Cardiac MRI
Renee Muchnik, M.D.
Heart and Vascular Institute, UPMC

Renee Muchnik, M.D., is with UPMC Heart and Vascular Institute and sees patients at UPMC Williamsport, 740 High St., and UPMC Muncy, 10 Shady Ln. To schedule an appointment with Dr. Muchnik at either location, call 570-321-2800. For more information, visit UPMC.com/HeartNCPA.