Are there any risks with echocardiography?
Echocardiography testing is very safe and it does not involve radiation. There is a small risk of side effects with the chemicals used in chemical stress tests.6, 7 The contrast dye that is sometimes used may trigger an allergic reaction. It can also damage the kidneys in people with diabetes or previous kidney damage. You should tell your healthcare provider if you have had a reaction to X-ray dye, shellfish, or iodine in the past.
An echo may not give accurate results if you are obese or have been diagnosed with chronic obstructive pulmonary disease, such as emphysema or chronic bronchitis, or if you have surgical incisions. In women who are obese or have large breasts, the image produced by echocardiography may appear fuzzy making it difficult to interpret. These women may have a transesophageal echo—in which the wand (transducer) is passed down the windpipe (or esophagus) to visualize the heart. This type of echo can be uncomfortable; you may be sedated to ease the discomfort. The accuracy of echo testing may be affected by some heart medications (including nitrates, calcium channel blockers, or beta blockers).8 Your doctor will tell you whether you should stop taking any medications before the test. In some cases, you can continue taking your medications and this will be taken into account when it comes to interpreting the test results.
Echocardiography also requires skill and experience; the results may vary depending on how well the test was done.9-11 New developments to improve image quality will make it easier to get the same results no matter who does the test.12
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