Brugada syndrome is a condition in which, despite the heart appearing structurally normal, a problem present from birth in the heart’s electrical system can lead to dangerous rhythm disorders. The most striking feature of this condition is that most patients live for many years without any symptoms but can suddenly develop a life-threatening rhythm disorder.
The condition takes its name from two brothers, Pedro and Josep Brugada, who first described it in 1992. Since then, the condition has been better understood, diagnostic methods have advanced, and treatment options have become clearer.
The problem in Brugada syndrome lies in the working of tiny gates in the heart cells. These gates are called ion channels. Ion channels are tiny passageways that allow electricity to flow in heart cells; they regulate the entry and exit of substances like sodium, potassium, and calcium. The proper working of these channels is needed for the heart to beat normally. In Brugada syndrome, there is a problem especially in the sodium channels. This problem is most often due to a specific genetic change.
How does the condition show itself?
Brugada syndrome causes no symptoms in most patients. The patient feels perfectly fine for years and may even compete as an athlete. But in some people, very fast and uneven rhythm disorders in the lower chambers of the heart (a fatal condition called ventricular fibrillation) can develop in certain situations. Ventricular fibrillation is a state in which the lower chambers cannot contract effectively and the heart cannot pump blood; without quick intervention, it leads to sudden cardiac arrest.
In patients who do have symptoms, fainting is the most common complaint. The patient suddenly loses consciousness while looking healthy and usually recovers shortly after. These fainting spells can be the warning signs of dangerous rhythm episodes. In some patients, unusual rhythm changes happen during sleep at night; they may be noticed as night sweats, waking up gasping for air, or trouble taking deep breaths.
What could be the triggers?
Some situations trigger rhythm disorders in Brugada syndrome. High fever is the most important trigger. Fever brings out the problem in the sodium channels and raises the risk of dangerous rhythm disorders. So in a patient with Brugada syndrome, a high fever is a serious warning sign and should be brought down quickly.
Some medications can also be triggers. Some rhythm-controlling drugs, some antidepressants, some anesthesia drugs, and even some pain relievers can be risky for these patients. People with Brugada syndrome should talk with their doctors about the medications they will use and follow current sources such as www.brugadadrugs.org.
Excessive alcohol intake, the period after heavy meals, electrolyte imbalances (especially low potassium), and substances like cocaine can also be triggers.
How is it diagnosed?
The diagnosis of Brugada syndrome rests on the ECG. An ECG, also called an EKG, is a simple, painless test that turns the heart’s electrical activity into a recording. In Brugada syndrome, there is a typical appearance on the ECG. This appearance is called the “Brugada pattern” and is recognized by an experienced doctor.
But the tricky side of Brugada syndrome is that the ECG pattern is not always seen. In the same patient, the ECG may show the typical pattern at times and look completely normal at other times. So a single normal ECG is not enough to rule out Brugada syndrome.
In patients with suspected Brugada syndrome but no typical pattern on ECG, a drug test can be done. In this test, a medication that briefly blocks the sodium channels is given through a vein, and the ECG is watched. In patients with Brugada syndrome, this medication brings out the typical ECG pattern. The test is done under intensive care monitoring, with conditions ready for quick intervention.
Changes in ECG lead placement also help in diagnosis. In a standard ECG, the electrodes placed on the chest are at certain points. In patients with suspected Brugada, moving these electrodes one rib space higher reveals the typical pattern more often.
24-hour ECG recording (Holter) is useful in some patients. A Holter is a small portable device worn for 24 to 48 hours that records every heartbeat. It is valuable for patients in whom ECG changes are more clear at night or after meals.
Echocardiography is done to evaluate the patient’s heart structurally. An echocardiogram is an imaging test that uses sound waves to show the structure of the heart. In Brugada syndrome, the heart structure is usually completely normal; this test is done to rule out other structural problems.
Electrophysiology study is offered in some patients for risk assessment. This procedure uses thin wires passed through a vein to study the heart’s electrical system in detail. In this test, it is checked whether dangerous rhythm disorders can be brought out by stimulation.
Genetic testing is used for the diagnosis of relatives and in family studies. If a genetic change is found in the patient, other family members can be checked for the same change. But a negative genetic test does not definitively rule out Brugada syndrome; because the known genetic change may not be present in every patient.
Risk assessment
The risk of sudden cardiac death is not the same in every patient with Brugada syndrome. Risk assessment guides the treatment decision.
High-risk group: Patients who have previously survived a cardiac arrest are at the top of this group. Patients with a history of fainting and a typical pattern on ECG are also high risk. Definitive treatment is needed for these patients.
Intermediate-risk group: Patients with a spontaneous typical ECG pattern but no history of fainting or family history of sudden death are in this group. Risk assessment in these patients is more detailed; an electrophysiology study and other tests guide the decision.
Low-risk group: Patients in whom the typical ECG pattern appears only during the drug test, who have never had symptoms, and have no family history are in this group. Close follow-up is done for these patients; special treatment is often not needed, but avoiding triggers is of vital importance.
Risk assessment is not something done once. The patient’s situation can change over the years; new symptoms may appear, or risk factors may be added. So regular follow-up is important.
Treatment options
Treatment of Brugada syndrome is largely based on risk assessment.
Avoiding triggers is the basic step for every patient. High fever should be brought down quickly; paracetamol (acetaminophen) is a safe option in this regard. In every situation with fever, a doctor should be reached and the situation reported. Brugada syndrome must always be mentioned.
Risky medications should be avoided. Which medications are safe and which are risky is informed by the doctor. The patient should also carry an information card; this card lets the medical team know quickly that there is Brugada syndrome in an emergency. Excessive alcohol intake, heavy meals, and substances like cocaine are risky and should be avoided.
Implantable cardioverter defibrillator (ICD) is the life-saving treatment in high-risk patients. An ICD is a device placed under the skin like a pacemaker but with a different role. This device monitors the heart constantly; when it detects a dangerous rhythm disorder (like ventricular fibrillation), it sends a small electric shock to the heart and restores the normal rhythm. So an ICD does not stop a fatal rhythm disorder from happening but acts immediately when it does.
ICD placement is a moderate surgical procedure. The device is placed below the collarbone; the wires from the device are guided through a vein up to the heart. The procedure is usually completed within an hour, and the patient goes home after one day in the hospital.
Medication can be used in some patients. A rhythm-controlling drug called quinidine reduces rhythm episodes in some Brugada patients. This medication can be preferred for those who are not candidates for an ICD or those who need add-on treatment with an ICD.
Catheter ablation has become an option in recent years. In this procedure, ablation is applied to the area on the front surface of the right ventricle thought to be the source of the faulty signals. Ablation is a procedure where the faulty signal pathway or spot is silenced with energy. Ablation for Brugada syndrome is not yet routinely offered to everyone, but it is a special treatment showing promising results in patients with frequent ICD shocks.
What should family members do?
Brugada syndrome is an inherited condition. The chance of the condition being present in first-degree relatives of the patient (parents, siblings, and children) is high. So when the diagnosis is made in one person, the family also needs to be evaluated.
Family evaluation usually begins with an ECG. When the typical pattern is seen, the diagnosis becomes clear. If the ECG looks normal and another family member already has the diagnosis, a drug test can be considered. Genetic testing is also used in family work; if the known genetic change has been identified in the family, other members can be easily checked for the same change.
Evaluation is especially important in members of families with a history of sudden death. This history can also point to other inherited rhythm disorders besides Brugada syndrome.
Daily life and Brugada syndrome
People diagnosed with Brugada syndrome can largely lead a normal life. But some adjustments need to be made.
Febrile illnesses call for special care. When fever appears, it should be brought down quickly with paracetamol. If the fever is high and resistant, a hospital should be reached. This is especially important in pediatric patients; when fever appears in a child, the family should act quickly.
Medication use is always something to watch for. Before starting a new medication, it should be checked whether that medication is safe in Brugada syndrome. The condition should be reported during dental visits, surgeries, and even when taking a simple cold medicine.
Sports are not forbidden for most patients. But in high-intensity competitive sports, the risk of dehydration, extreme fatigue, and electrolyte imbalance rises. This can be a trigger. Which sports can be done at what intensity is decided based on the person; heavy sports should not be started without a doctor’s evaluation.
Pregnancy goes smoothly in most women with Brugada syndrome. Medications that can be triggers should be avoided during pregnancy. Some anesthesia drugs used during delivery can be risky; so the situation should always be reported to the anesthesia team. Women with an ICD can also become pregnant; the device does not cause problems during pregnancy.
For the decision of having a child, genetic counseling is offered. Brugada syndrome shows autosomal dominant inheritance; that is, if one parent has it, the chance of passing it to the child is around 50%. But not every gene carrier shows the disease with the same severity. This topic should be evaluated in detail at a specialized center.
When to call the doctor
For a person with Brugada syndrome, fainting, confusion, dizziness, or palpitation episodes call for prompt attention. These symptoms can be the warning signs of a dangerous rhythm disorder.
High fever (above 38.5°C / 101.3°F) in a Brugada patient calls for urgent evaluation. Bringing the fever down quickly and getting an ECG are important.
New onset of chest pain, shortness of breath, sudden weakness, or loss of consciousness calls for the emergency room.
In a patient with an ICD, if the device delivers a shock (felt as a sudden kick in the chest), the doctor should be called. A single shock usually calls for a planned check-up; multiple shocks one after the other call for urgent attention.
Frequently Asked Questions
If I have Brugada syndrome, will I definitely die?
No. Many people with Brugada syndrome live long and healthy lives. The risk is not the same in every patient. In high-risk patients, an ICD provides protection; in low-risk patients, avoiding triggers is often enough. Getting the diagnosis does not mean your life is over; on the contrary, the diagnosis opens the path to the right treatment.
My ECG is normal, but the doctor says "I suspect Brugada." How can this be?
In Brugada syndrome, the ECG pattern is not always seen; it appears at times and disappears at others. So a single normal ECG does not rule out the condition. A drug test, ECGs taken at different times, and family history clarify the diagnosis.
If I have Brugada syndrome, will my child have it too?
The condition shows autosomal dominant inheritance, meaning the chance of passing it to the child is 50%. But carrying the gene does not mean the disease will show with the same severity. People who carry the gene may have no symptoms at all. Getting genetic counseling before having a child is the right step.
Can I do sports?
Most patients can do moderate-intensity sports. Activities like swimming, walking, and cycling are usually safe. Avoiding intense competitive sports and heavy exercise in very hot environments is advised. Professional sports should not be started without a doctor's evaluation.
Why is fever so dangerous in Brugada syndrome?
Fever brings out the sodium channel problem that is at the heart of Brugada syndrome. This raises the risk of dangerous rhythm disorders. So fever should be brought down quickly when it appears. This is especially important in pediatric patients.
How will I live after getting an ICD?
Most patients continue with their normal lives. The device is felt as a small bump under the skin but does not get in the way of daily life. Mobile phones, microwaves, and household appliances do not cause problems. Care should be taken with strong magnetic fields and some medical scans (especially MRI); but today, MRI-compatible devices are widely available.
Is ablation a definitive treatment for Brugada syndrome?
Not yet. Ablation is an option that comes up in patients with frequent ICD shocks and shows promising results. But it is not yet accepted as a routine treatment. The standard treatment in high-risk patients is still an ICD.
Will I need to be in follow-up for the rest of my life?
Yes. Brugada syndrome is a lifelong condition; risk assessment can change over the years. Regular check-ups (usually once a year) are important for catching new symptoms and changes in risk early.
A relative of mine died from Brugada syndrome. What should I do?
If a first-degree relative died suddenly from Brugada syndrome, you should also be evaluated. The evaluation, which begins with an ECG, continues with a drug test and genetic testing if needed. This evaluation should be done by an arrhythmia and electrophysiology specialist.