Specialties
    Executive Health Assessment
    Our doctors
    Referrer services
    Contact us
    Request appointment
    Home
    1. Home
    2. Specialties
    3. Diagnostics
    4. Transoesophageal echocardiogram (TOE)

    Transoesophageal echocardiogram (TOE)

    At Mayo Clinic Healthcare, our cardiology specialists use transoesophageal echocardiography (TOE) to investigate heart valve function and detect blood clots, infections, and other cardiac conditions that may not be visible on a standard echocardiogram.

    If you have been advised to undergo a TOE or are experiencing symptoms such as palpitations, chest discomfort or unexplained breathlessness, our team provides prompt access to specialist assessment and personalised care at our London clinic.

    Request an appointment

    • A transoesophageal echocardiogram (TOE) is a specialised ultrasound test that produces detailed images of the heart.

      Unlike a standard echocardiogram, which takes images through the chest wall, a TOE uses a small probe that is gently passed down the throat into the oesophagus. Because the oesophagus sits directly behind the heart, this approach allows clinicians to obtain clearer and more detailed images of the heart’s structures.

    • A TOE may be recommended when more detailed images of the heart are required than those provided by a standard echocardiogram.

      Your cardiologist may recommend a TOE to:

      • Assess heart valve disease in greater detail
      • Investigate suspected infection of the heart valves (endocarditis)
      • Detect blood clots within the heart chambers
      • Evaluate the cause of stroke or transient ischaemic attack (TIA)
      • Examine prosthetic heart valves
      • Provide detailed imaging before or during certain cardiac procedures

      This test allows cardiologists to obtain highly detailed images that support accurate diagnosis and treatment planning.

    • To prepare for your transoesophageal echocardiogram, you will usually be asked to:

      • Avoid eating or drinking for six hours before the procedure
      • Take your usual medications unless your doctor advises otherwise
      • Arrange for someone to accompany you home afterwards, as you may receive a sedative during the test

      Your care team will provide detailed instructions before your appointment.

    • Your procedure will take place at our London clinic.

      During the examination:

      • You will lie on your side on an examination couch
      • A nurse will insert a small cannula into your arm so that sedation can be administered
      • Your throat will be numbed with a spray to make the procedure more comfortable
      • Once you are relaxed, the doctor will gently guide the probe down your throat into the oesophagus
      • The probe will capture detailed ultrasound images of your heart

      The test itself usually takes 20 to 30 minutes, although you should expect to remain in the department for approximately two to three hours to allow time for preparation and recovery.

      You may experience mild pressure in your throat during the procedure, but sedation helps ensure that most patients remain comfortable.

    • Following your transoesophageal echocardiogram, you will rest in the department for approximately 45 to 60 minutes while the sedation wears off.

      Once you are fully awake, you will be able to go home. However, you must arrange for someone to accompany you home and remain with you for the rest of the day.

      You should only begin eating or drinking once the numb sensation in your throat has completely worn off. Your first drink should be water, taken slowly. If swallowing feels uncomfortable, wait a little longer before attempting to eat or drink.

      For the remainder of the day you should:

      • Avoid driving
      • Avoid drinking alcohol
      • Avoid making important decisions

      These restrictions usually apply until the following day.

      Some patients experience a mild scratchy sensation in the throat for one or two days after the procedure. This is common and usually resolves quickly.

    • One of our cardiology specialists will review the results of your TOE and discuss the findings with you at your follow-up appointment.

      Your clinician will explain what the results mean for your heart health and discuss whether any additional tests, treatments or lifestyle changes may be recommended.

    • A transoesophageal echocardiogram is generally considered a safe procedure. Complications are uncommon, but potential risks may include:

      • Minor bleeding from the mouth
      • Damage to the oesophagus (very rare)
      • Allergic reaction to the sedative
      • Damage to teeth (rare, and more likely if teeth are loose or capped)

      Your cardiologist will carefully assess your medical history and perform the necessary checks to ensure the procedure is safe for you.

    • Patients choose Mayo Clinic Healthcare for advanced cardiac imaging because of our commitment to clinical excellence and personalised care.

      Our transoesophageal echocardiography service offers:

      • Access to internationally recognised Mayo Clinic cardiology expertise
      • Advanced cardiac imaging technology
      • Rapid access to private TOE testing in London
      • Multidisciplinary collaboration between cardiologists and cardiac imaging specialists
      • Personalised treatment recommendations based on detailed diagnostic findings

      This integrated approach ensures patients receive accurate diagnosis and coordinated care.

    Private health insurance

    Mayo Clinic Healthcare works with major private health insurance providers, including AXA PPP, Aviva, BUPA, Vitality Health and WPA. Self-pay arrangements are also available.

    If you are concerned about your heart health or have been advised to undergo a transoesophageal echocardiogram, you can request an appointment with our cardiology team.