TEE cardioversion combines transesophageal echocardiography (TEE) with electrical cardioversion to safely restore a normal heart rhythm in patients with certain arrhythmias—most commonly atrial fibrillation (AFib) or atrial flutter. The TEE portion is used to check for blood clots inside the heart before cardioversion is performed, helping reduce the risk of stroke.
This approach allows cardioversion to be performed more safely and, in many cases, without waiting weeks for blood thinner therapy, when appropriate.
What Is TEE-Guided Cardioversion?
TEE-guided cardioversion is a two-part procedure:
- Transesophageal Echocardiography (TEE):
A specialized ultrasound test in which a probe is placed in the esophagus to obtain detailed images of the heart—particularly the left atrial appendage, where clots can form in AFib. - Electrical Cardioversion:
A controlled, synchronized electrical shock delivered to the heart to restore a normal sinus rhythm.
By confirming that no clots are present before cardioversion, this combined approach helps minimize the risk of dislodging a clot during the procedure.
Why Is TEE Cardioversion Performed?
Your cardiologist may recommend TEE-guided cardioversion if you have:
- Atrial fibrillation (AFib) or atrial flutter
- Symptoms such as:
- Palpitations
- Fatigue
- Shortness of breath
- Dizziness
- A need for rhythm control (restoring normal heart rhythm)
- Uncertainty about how long the abnormal rhythm has been present
- A desire to proceed with cardioversion without prolonged pre-treatment with blood thinners, when appropriate
This approach is often used when immediate or timely restoration of normal rhythm is preferred.
How the Procedure Works
TEE cardioversion is typically performed in a hospital or outpatient setting and usually takes about 1 to 2 hours in total.
During the Procedure:
- You will receive sedation to ensure comfort
- A TEE probe is gently inserted into the esophagus to obtain detailed images of the heart
- Your physician checks for blood clots, especially in the left atrial appendage
- If no clots are present, electrical cardioversion is performed:
- Pads are placed on the chest
- A brief, controlled electrical shock is delivered
- The heart rhythm is reset to normal sinus rhythm
Because of sedation, most patients do not feel or remember the cardioversion.
What to Expect Before and After
Before the Procedure:
- You will be asked to fast (no food or drink) for several hours
- Medications, including blood thinners, will be reviewed
- You should arrange for someone to drive you home
- Your physician will explain the procedure and answer any questions
After the Procedure:
- You will be monitored until sedation wears off
- Your throat may feel slightly sore from the TEE
- You may have mild skin irritation where cardioversion pads were placed
- Most patients go home the same day
- Blood thinner therapy may continue for a period of time, depending on your condition
- Follow-up care will be scheduled to monitor heart rhythm
Many patients experience improvement in symptoms soon after normal rhythm is restored.
Benefits of TEE Cardioversion
TEE-guided cardioversion offers several important advantages:
- Reduces stroke risk by checking for clots before cardioversion
- Allows for timely treatment without waiting for extended anticoagulation in some cases
- Minimally invasive and well tolerated
- High success rate in restoring normal heart rhythm
- Can improve symptoms such as fatigue, palpitations, and shortness of breath
Risks and Considerations
TEE cardioversion is generally safe, but potential risks include:
- Throat discomfort or irritation from the TEE probe
- Reaction to sedation
- Skin irritation from cardioversion pads
- Rare risk of esophageal injury
- Temporary heart rhythm disturbances
- Risk of stroke (significantly reduced with TEE screening and proper anticoagulation)
Your cardiologist will evaluate your individual risk factors and ensure the procedure is appropriate for you.
Frequently Asked Questions
Will I be awake during the procedure?
You will be sedated and comfortable. Most patients do not remember the procedure.
Is the procedure painful?
No. Sedation is used, and the electrical shock is delivered while you are asleep.
Why is TEE needed before cardioversion?
TEE helps ensure there are no blood clots in the heart, which could otherwise increase the risk of stroke during cardioversion.
How successful is cardioversion?
Cardioversion is often successful in restoring normal rhythm, though some patients may experience recurrence of arrhythmia over time.
Will I need to take blood thinners afterward?
In many cases, blood thinners are continued for a period after the procedure to reduce stroke risk. Your physician will provide specific guidance.
How soon can I return to normal activities?
Most patients can resume normal activities within 24 hours, depending on recovery from sedation.
When to Consider TEE Cardioversion
TEE-guided cardioversion may be appropriate if you have:
- Atrial fibrillation or atrial flutter
- Symptoms affecting your quality of life
- A need for prompt restoration of normal heart rhythm
- Uncertainty about clot risk requiring imaging before cardioversion
Early treatment can help improve symptoms and reduce potential complications.
Schedule a Consultation
If you are experiencing symptoms of an irregular heart rhythm, such as palpitations, fatigue, or shortness of breath, TEE-guided cardioversion may be an effective option to restore normal rhythm safely.
The team at Cedars Heart Clinic offers advanced cardiac rhythm management with a focus on precision, safety, and patient-centered care. Contact our office to schedule a consultation and learn more about your treatment options.
