The thesis statement is typically located at the end of your opening paragraph. (The opening paragraph serves to set the context for the thesis.) Remember, your reader will be looking for your thesis. Make it clear, strong, and easy to find. Attributes of a good thesis:
What is transesophageal echocardiography? Transesophageal echocardiography (TEE) is a test that produces pictures of your heart. TEE uses high-frequency sound waves (ultrasound) to make detailed pictures of your heart and the arteries that lead to and from it.
A TEE is a special type of echocardiogram that takes pictures of the back of the heart through the esophagus (the tube leading from the mouth to the stomach). TEE also is often used to define complex heart defects. Catheter procedures also are sometimes used during surgery to help repair complex defects.