The magnetic fields and radio waves used in cardiac MRI have no side effects. This method of taking pictures of organs and tissues doesn't carry a risk of causing cancer or birth defects.
Serious reactions to the contrast agent used during some MRI tests are very rare. However, side effects are possible and include the following:
- Nausea (feeling sick to your stomach)
- Changes in taste
- Allergic reactions
Rarely, the contrast agent can harm people who have severe kidney or liver disease. The substance may cause a disease called nephrogenic (NEF-ro-JEN-ik) systemic fibrosis.
If your cardiac MRI includes a stress test, more medicines will be used during the test. These medicines may have other side effects that aren't expected during a regular MRI scan, such as:
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