A heart that suddenly starts racing can be difficult to ignore. You may feel perfectly fine one moment and experience a rapid heartbeat the next. Sometimes, the episode ends within minutes. At other times, it lasts longer and leaves you feeling tired, dizzy or uncomfortable.
These episodes may be linked to supraventricular tachycardia (SVT), a condition involving abnormal electrical activity in the heart. While medication can help manage symptoms, some patients need a more targeted approach. SVT ablation is one treatment option that aims to correct the electrical pathway responsible for the rapid rhythm.
For patients in Dubai, Abu Dhabi and across the UAE, understanding the condition and available treatment options is a useful first step towards better heart rhythm management.
What Happens Inside the Heart During SVT?
Your heart has an electrical system that controls the timing of every heartbeat. Normally, electrical signals begin in the sinoatrial node, travel through the atria and reach the ventricles through the atrioventricular (AV) node.
In SVT, an abnormal electrical circuit or source causes the heart to beat unusually fast.
The rhythm can begin suddenly and may stop just as unexpectedly. Unlike the increased heart rate associated with exercise, SVT can occur even when you're resting.
Common types include:
AVNRT: An abnormal electrical circuit involving pathways near the AV node.
AVRT: A rapid rhythm involving an additional electrical connection between the upper and lower heart chambers.
Atrial tachycardia: A fast rhythm originating from an area within the upper chambers.
Although these conditions can produce similar symptoms, their electrical mechanisms are different. Identifying the exact type helps the specialist choose an appropriate treatment.
How Can You Recognise an SVT Episode?
Not every episode of a fast heartbeat indicates SVT. However, certain symptoms may suggest an abnormal rhythm that needs medical evaluation.
Look out for:
A sudden increase in heart rate.
A pounding or fluttering sensation in the chest.
Dizziness or lightheadedness.
Breathlessness during ordinary activities.
Chest discomfort.
Weakness or unusual fatigue.
Feeling faint or experiencing temporary loss of consciousness.
Some people experience episodes occasionally, while others have repeated attacks that affect their sleep, work and exercise routine.
Severe chest pain, fainting or significant breathing difficulty requires urgent medical assessment.
How Do Doctors Diagnose SVT?
An accurate diagnosis helps distinguish SVT from other conditions that can cause palpitations.
An svt tachycardia ecg evaluation is often one of the first investigations. An electrocardiogram records the heart's electrical activity and can help identify the rhythm when an episode is happening.
However, SVT doesn't always occur during a medical appointment. If the ECG appears normal, further monitoring may be necessary.
Your specialist may recommend:
1. Holter monitoring: A portable device records heart rhythm continuously over a specified period.
2. Event monitoring: Helps capture irregular episodes that happen occasionally.
3. Echocardiography: Uses ultrasound to examine heart structure and pumping function.
4. Electrophysiology study: A specialised test in which catheters record electrical signals inside the heart to identify the source of the abnormal rhythm.
An EP study can be particularly useful when the doctor is considering catheter-based treatment.
When Should You Consider SVT Ablation?
Treatment isn't the same for every patient. Someone with occasional, mild symptoms may not need the same approach as someone experiencing frequent episodes that interfere with daily life.
Doctors may initially recommend observation, appropriate medicines or specific techniques to manage certain episodes.
However, svt ablation may be considered when:
Rapid heartbeat episodes happen repeatedly.
Symptoms are uncomfortable or disruptive.
Medication doesn't provide satisfactory control.
Medicines cause unwanted side effects.
An abnormal electrical pathway has been identified.
The patient prefers a procedural treatment after discussing the alternatives.
The decision depends on the type of SVT, the patient's medical history and the potential benefits and risks of treatment.
What Makes Catheter Ablation Different?
Catheter ablation focuses on the electrical source of the problem rather than simply trying to control the heart rate.
During svt ablation, the electrophysiologist uses thin, flexible tubes called catheters to reach the heart through blood vessels, usually from the groin.
The procedure generally involves the following stages:
1. Preparation and assessment
Before treatment, the medical team reviews previous ECG recordings, medications and other investigations. You'll receive instructions about fasting, medicines and what to expect on the day.
2. Accessing the heart
The doctor inserts the catheters through a blood vessel after preparing and numbing the access area. Sedation or general anaesthesia may be used depending on the clinical situation.
3. Mapping electrical activity
Specialised equipment records electrical signals from different parts of the heart. This helps identify the abnormal pathway or circuit responsible for the rapid rhythm.
4. Treating the target area
Once the source is located, the specialist applies controlled energy to modify a small area of tissue.
Two commonly used methods are:
Radiofrequency ablation: Uses heat to create a small controlled lesion.
Cryoablation: Uses extreme cold to modify the targeted tissue.
The appropriate technique depends on the location of the abnormal pathway and the type of SVT.
5. Checking the heart rhythm
The specialist reassesses the electrical activity to determine whether the abnormal rhythm can still be triggered.
This helps evaluate the immediate procedural result.
What Are the Benefits and Possible Complications?
For many appropriately selected patients, catheter treatment can provide lasting relief from recurrent SVT episodes.
Potential benefits include:
Fewer episodes of rapid heartbeat.
Reduced need for long-term medication in suitable cases.
Less disruption to everyday activities.
Greater confidence during exercise and routine activities.
Treatment directed at the underlying electrical problem.
However, patients should understand the possible complications before proceeding.
These can include bleeding, infection, blood vessel damage, blood clots and injury to the heart's normal electrical conduction system. In rare cases, damage to the conduction system may require pacemaker implantation.
The individual risk depends on the type of SVT, the location being treated and the patient's overall health.
Recovery and Life After the Procedure
After svt ablation, patients are monitored in a recovery area. The medical team checks their heart rhythm, blood pressure and catheter insertion site.
Some patients return home the same day, while others may need overnight observation.
During the recovery period:
Keep the catheter insertion area clean and follow wound-care advice.
Avoid heavy lifting and strenuous exercise for the recommended period.
Take medicines as prescribed.
Attend follow-up appointments.
Contact your medical team if symptoms persist or worsen.
Mild bruising or tenderness around the insertion site is possible. Some patients may also notice occasional palpitations during the healing period.
Seek urgent medical care if you experience severe chest pain, fainting, significant breathing difficulty or uncontrolled bleeding.
Finding Specialist SVT Treatment in Dubai and Abu Dhabi
When dealing with an abnormal heart rhythm, choosing an experienced cardiac electrophysiologist is an important part of treatment planning.
An electrophysiologist specialises in the heart's electrical system and can evaluate different rhythm disorders using ECG recordings, monitoring and specialised diagnostic procedures.
At The Heart.ae, Dr Moutaz El Kadri provides specialised cardiac electrophysiology care for patients with heart rhythm conditions.
Patients in Dubai and Abu Dhabi can discuss their symptoms, diagnostic findings and treatment options with the specialist to understand the most suitable approach for their condition.
Conclusion
Recurring episodes of rapid heartbeat deserve proper medical attention, especially when they affect your comfort, confidence or daily activities. Identifying the underlying rhythm problem is the first step towards choosing the right treatment.
SVT ablation can be an effective option for appropriately selected patients with supraventricular tachycardia. If you're experiencing repeated palpitations or have already received an SVT diagnosis, consult a cardiac electrophysiologist at The Heart.ae to discuss your options for heart rhythm treatment in the UAE.
Frequently Asked Questions
1. Is SVT dangerous if it happens frequently?
Frequent SVT episodes can cause discomfort, dizziness and breathlessness. Although many forms are manageable, repeated episodes should be evaluated to determine the underlying cause and appropriate treatment.
2. Can SVT be treated permanently?
Catheter ablation can provide long-term relief for many patients, depending on the type of SVT. However, recurrence is possible, and no procedure guarantees a permanent result for everyone.
3. Is an electrophysiology study necessary before ablation?
An EP study is commonly performed as part of the procedure to identify the abnormal electrical pathway. It helps the specialist understand the rhythm mechanism and guide treatment.
4. Will I need medication after SVT ablation?
Some patients can reduce or discontinue rhythm-control medication after successful treatment, while others may still require medicines for different medical reasons. Your doctor will guide any changes.
5. Can SVT happen during sleep?
Yes. SVT episodes can occur during sleep, rest or physical activity. If you experience sudden racing heartbeats at night, discuss them with your cardiologist.
6. How soon can I return to work after ablation?
Many patients resume light work within a few days, depending on their recovery and job requirements. Your specialist will provide individual advice.
7. Which doctor should I consult for SVT in the UAE?
A cardiac electrophysiologist is the appropriate specialist for evaluating and treating SVT. They can assess your heart rhythm and discuss medication, monitoring or catheter-based treatment.
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