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This alternative to standard echocardiography also used sound waves to produced
images of the heart. But instead using an external transducer, a tube equipped
with a transducer is inserted down the throat and into the esophagus, behind the
heart. Just as with the standard echocardiogram, the trans esophageal echocardiogram
uses sound waves to produce images of the heart. This test is particularly useful
when the patient has a thick chest wall, congestive obstructive pulmonary disease
or obesity, which can make standard echocardiography difficult.
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