040 68334455
WhatsApp
Patient Portal
Home Care
What is Long QT Syndrome?
Written by Medicover Team and Medically Reviewed by Dr Pabba Anish , Cardiologist
Long QT Syndrome is a heart rhythm problem. It affects how your heart beats by slowing down the time it takes for the heart to reset between beats. This delay can lead to irregular heart rhythms, called arrhythmias, which can sometimes be dangerous. People with LQTS may not notice symptoms until something triggers it, like stress, exercise, or sleep. It can be inherited or caused by certain medicines or medical issues.
What Are the Symptoms and Warning Signs of Long QT Syndrome?
Symptoms of Long QT Syndrome don't always show right away. They often appear during physical activity, strong emotions, or sleep. Noticing the signs early can help prevent life-threatening problems.
- Fainting or blacking out
- Sudden body shaking (like a seizure)
- Collapsing for no clear reason
- Fast or skipping heartbeat (palpitations)
- Shortness of breath or feeling dizzy
- Sudden cardiac arrest (in severe cases)
What Causes Long QT Syndrome?
This condition happens when the heart's electrical system takes too long to reset. That delay can lead to dangerous rhythms. Main causes include:
- Genetic mutations inherited from one or both parents
- Certain medicines like antibiotics, antidepressants, or allergy drugs
- Low potassium, calcium, or magnesium levels
- Health issues like eating disorders or thyroid problems
In most inherited cases, only one parent needs to pass the gene. But some people get it without any family history.
Get a second opinion from trusted experts and makeconfident, informed decisions.
Get Second OpinionWhat's the Difference Between Long QT and Short QT Syndrome?
Both are rare heart conditions that affect rhythm. But they work in opposite ways.
- Long QT Syndrome (LQTS): Slows the heart's reset time. Can cause fainting or cardiac arrest.
- Short QT Syndrome (SQTS): Speeds up reset time. Also increases the risk of sudden death.
Long QT Syndrome and Short QT Syndrome are both rare heart rhythm disorders that affect the heart's electrical system, but they act in opposite ways.
Key Differences
| Feature | Long QT Syndrome | Short QT Syndrome |
|---|---|---|
| QT interval on ECG | Prolonged | Shortened |
| Main cause | Delayed repolarization | Fast repolarization |
| Triggers | Exercise, emotions, sleep | Rest or sleep |
| Common genes | KCNQ1, KCNH2, SCN5A | KCNH2, KCNQ1, KCNJ2 |
| Treatment | Beta-blockers, ICD, lifestyle changes | ICD, medication (limited), monitoring |
| Risk | Sudden fainting, cardiac arrest | Sudden cardiac arrest (often no warning) |
Both may run in families and need different care plans.
Are There Different Types of Long QT Syndrome?
Yes, there are different types based on the gene involved. Each type may have different symptoms or triggers.
- LQT1: Triggered by exercise, especially swimming
- LQT2: Triggered by emotions or sudden noises
- LQT3: Often happens during sleep
Knowing your type helps doctors give better treatment and advice.
How Is Long QT Syndrome Diagnosed?
Diagnosing Long QT Syndrome early can help prevent serious heart issues. Doctors use tests to check your heart's rhythm and look for signs of electrical problems. They may also ask about symptoms, family history, and any sudden fainting spells or seizures. Getting the right tests is key to finding and managing this condition.
- ECG (electrocardiogram): Measures heart activity and QT interval
- Stress test: Shows how the heart reacts to exercise
- Holter monitor: Records heartbeats for 1 to 2 days
- Genetic testing: Looks for faulty genes linked to LQTS
Doctors also ask about symptoms, medications, and family history.
What Are the Treatment Options for Long QT Syndrome?
Treating Long QT Syndrome focuses on keeping your heart rhythm safe and steady. The right treatment can lower your risk of sudden problems and help you stay active. Depending on your symptoms and test results, doctors may suggest medications, devices, or lifestyle changes.
- Beta-blockers: Slow the heart and prevent rhythm problems
- ICD (Implantable Cardioverter Defibrillator): Shocks the heart during life-threatening arrhythmias
- Lifestyle changes: Avoid loud noises, stress, and risky medications
- Surgery: Used if medicines don't work (left cardiac sympathetic denervation)
With the right care, most people with LQTS live normal lives.
When Should You See a Doctor?
It's important not to ignore symptoms that may point to Long QT Syndrome. Even if you feel fine most of the time, warning signs like fainting or fast heartbeats can be serious. Seeing a doctor early can help prevent life-threatening problems and keep your heart safe.
- Have fainting spells or feel dizzy often
- Had seizures not explained by epilepsy
- Have a family history of sudden death
- Show odd results on an ECG
- Take drugs known to affect heart rhythms
Seeing a heart specialist early can help prevent serious events.
Your health is everything - prioritize your well-being today.
Consult Long Qt Syndrome Doctors Today
What Is the Recovery Process for Long QT Syndrome?
LQTS can't always be cured, but it can be managed. With treatment and follow-up, you can stay healthy and active. Recovery steps:
- Take medicines as prescribed
- Go to all follow-up visits
- Watch for symptoms like fainting or palpitations
- Adjust your habits to match your LQTS type
Many people return to normal routines after diagnosis and treatment.
How Can Long QT Syndrome Be Prevented or Managed?
Living with Long QT Syndrome doesn't have to be overwhelming. While you may not be able to prevent the condition entirely, smart choices can help you stay safe and healthy. Managing triggers, taking medication as directed, and having regular heart checkups are key to reducing risks and living a full life.
- Avoid medicines that affect QT intervals
- Keep electrolytes in balance
- Teach your family about your condition
- Use wearable heart monitors if needed
- Wear a medical ID in emergencies
Managing LQTS well means being aware, prepared, and supported.
Our Experience in Treating Long QT Syndrome
At Medicover, we care for people with rare heart diseases like Long QT Syndrome.
Here's how we support you:
- Easy-to-follow treatment plans
- Family genetic testing
- Heart rhythm checks with ECG
- Friendly follow-ups and lifestyle tips
Our expert team includes heart doctors, rhythm specialists, and genetic counselors. We create care plans that match your needs and help your family with screening and advice.
