The ultrasound examination of the heart (TEE) through the gullet, the oesophagus is actually a gastroscopy. Under local anaesthesia or minor anaesthesia, the ultrasound probe is inserted into the oesophagus. Since the oesophagus runs directly behind the heart, the individual structures of the heart can be visualised much better than in the examination through the chest wall (TTE). A frequent question is the search for clots in the heart or in the case of heart or heart valve defects. The aorta can also be assessed.

How Does a Transoesophageal Examination Work?

For the examination, you will usually be given a short sedation (propofol) or a local anesthetic of the throat. Subsequently, the ultrasound probe is inserted through the mouth into the esophagus. The examination allows the heart to be viewed from inside the chest. Once the probe is placed, they will feel nothing more than a slight sensation of pressure in the throat or chest area. The examination is performed in the left-sided position and takes about 15-20 minutes. You will be able to breathe normally throughout the examination. Transesophageal echocardiography does not cause any pain. During the examination, you will be under the constant care of at least two medical professionals – one of whom is always a medical practice assistant.

What Preparations are Necessary for a TEE?

For transesophageal echocardiography, the upper digestive tract must be free of food residues. Therefore, you should be fasting on the day of the examination. You should not consume any liquids or food until at least 6 hours before the examination. The necessary intake of medication with a small sip of water is permitted. If you suffer from diabetes, please discuss the more detailed preparations with us in advance.

What should I do after the Examination?

After receiving sedative medication, you should not drive a vehicle or operate machinery the same day after the examination. You should also not sign any legal documents. Do not eat or drink until the numbness in your throat has completely disappeared. If you experience abdominal pain or any other disturbance of well-being (e.g. dizziness, nausea, vomiting) after the examination, inform us immediately.

What Risks are Associated with this Examination?

Although transoesophageal echocardiography is a low-complication method and is performed in our Heart Center in Zurich. Complications can occur in very rare cases, as:

• Very rare: injuries to the oesophagus in the presence of existing changes (oesophageal varices, diverticula, etc.
• Very rarely: bleeding or bleeding tendency when taking blood-thinning medication
• Extremely rare: hypersensitivity reactions to the sedation agent used