17616 Ventricular Tachycardia
Informed by recognized medical guidance
Overview
Ventricular tachycardia is a fast, abnormal heart rhythm that starts in the lower chambers of the heart (ventricles). It can make the heart beat too fast to pump blood properly.
Key facts
- It is a serious condition that may lead to fainting or cardiac arrest.
- Some people feel no symptoms at all.
- Treatment depends on the cause and how well the heart is pumping.
It is not common in the general population, but it is more likely in people with heart disease.
It most often affects people with heart conditions, such as a previous heart attack, heart failure, or cardiomyopathy. It can also rarely affect young, healthy people with inherited heart conditions.
Symptoms
- Chest pain lasting more than a few minutes
- Difficulty breathing or shortness of breath at rest
- Fainting or loss of consciousness
- A pulse that feels very fast and irregular, especially with any of these symptoms
- ⚠New or worsening palpitations that do not go away quickly
- ⚠Dizziness that keeps coming back
- ⚠Feeling light-headed when standing up or moving
Common symptoms
- Heart palpitations (feeling like your heart is racing or fluttering)
- Dizziness or light-headedness
- Shortness of breath
- Chest pain or discomfort
- Fainting (syncope)
Symptoms in children
- Ventricular tachycardia is rare in children. When it happens, symptoms may include fatigue, dizziness, or fainting during play or exercise, or no symptoms at all.
Symptoms in older adults
- Older adults may also have symptoms like confusion, feeling weak, or falls, which can be caused by a drop in blood pressure.
Causes
Main causes
- Scar tissue in the ventricles from a previous heart attack
- Heart failure or weakened heart muscle (cardiomyopathy)
- Abnormal electrical pathways present at birth (inherited heart conditions)
- Electrolyte imbalances in the blood
- Certain medicines or illegal drugs
- Severe stress or intense physical activity in some people
Risk factors
- Age (more common in older adults)
- A personal history of heart disease
- Family history of ventricular tachycardia or sudden cardiac arrest
- Having had heart surgery or a heart transplant
- High blood pressure, diabetes, or smoking
When to see a doctor
See a doctor urgently if:
- If you have fainted, had unexplained blackouts, or chest pain, seek emergency care right away.
- If you have palpitations that last for more than a few minutes or come with dizziness, seek same-day medical advice.
Book a routine appointment if:
- Make an appointment if you often feel your heart racing or fluttering, especially if you also feel tired or short of breath.
- If you know you have a heart condition and notice any change in your symptoms, see your doctor.
Diagnosis
A doctor will listen to your heart, ask about your symptoms, and may order tests to check your heart's rhythm and structure.
Tests that may be done
- Electrocardiogram (ECG/EKG) — stickers on the chest record the heart's electrical signals.
- Holter monitor — a portable ECG worn for 24 hours or longer to catch irregular rhythms.
- Event monitor — a device you wear for weeks that you activate when you feel symptoms.
- Echocardiogram — an ultrasound of the heart to check its structure and pumping strength.
- Blood tests — to check for electrolyte problems, thyroid issues, or heart damage.
- Exercise stress test — to see how your heart behaves during physical activity.
- Cardiac MRI or CT scan — for detailed pictures of the heart.
What to expect at your appointment
You may be referred to a specialist called an electrophysiologist, who treats heart rhythm problems. Expect to go through a complete evaluation, and do not hesitate to ask questions.
Treatment
Treatment depends on what is causing the VT, how often it happens, and how well your heart is pumping. The goal is to stop the abnormal rhythm, prevent it from coming back, and reduce the risk of sudden cardiac arrest.
Self-care at home
- Learn to check your pulse and know what feels normal for you.
- Track your symptoms in a diary to share with your doctor.
- Take all medicines exactly as prescribed (only for your own condition).
- Avoid triggers such as heavy stimulants, energy drinks, or illegal drugs.
Medical treatments
Doctors may use medicines to control the heart rhythm or slow it down. They may also recommend a procedure called catheter ablation, which uses heat or cold to destroy the tiny area of heart tissue causing the abnormal signal. In some cases, a device called an implantable cardioverter-defibrillator (ICD) is placed under the skin to detect and stop dangerous rhythms. The choice of treatment is personal and based on your condition.
When is surgery considered?
Catheter ablation or surgery may be an option if medicines do not work or if there is a clear area causing the VT. A heart specialist will decide with you whether this is right.
Living with this condition
If you have ventricular tachycardia, you can still live a full life. Work with your heart team to create a plan for daily activities, work, driving, and exercise. Some people may be told to avoid driving if they have fainted recently.
Lifestyle tips
- Quit smoking and avoid second-hand smoke.
- Limit alcohol and avoid energy drinks.
- Manage stress with breathing exercises, yoga, or talking to someone.
- Take all prescribed medicines as directed.
Diet and exercise
Eat a heart-healthy diet rich in vegetables, fruits, whole grains, lean proteins, and healthy fats. Talk to your doctor before starting an exercise program. Many people can safely do moderate activities like walking or cycling.
Mental health and emotional wellbeing
Living with a heart rhythm condition can be worrying. It is normal to feel anxious, especially after a scary episode. Talk to your doctor if anxiety is affecting your sleep or daily life. Counseling and support groups can help.
Prevention
It may not always be possible to prevent ventricular tachycardia, especially if you have heart disease or an inherited condition. But taking care of your heart can lower your risk.
Vaccines
Getting recommended vaccines, such as the flu vaccine, can help prevent illnesses that might stress your heart.
Screening programmes
If you have a family history of heart rhythm problems or sudden cardiac arrest, your doctor may recommend screening tests to check your heart.
Complications
If left untreated
- Fainting due to a sudden drop in blood pressure
- Cardiac arrest, where the heart stops and blood stops flowing to the brain and vital organs
- Heart failure if the heart is overworked for a long time
Long-term outlook
With proper diagnosis and treatment, many people with ventricular tachycardia live long, healthy lives. Your outlook depends on the cause and how well your heart works. New treatments and devices can protect you from the most serious risks. Your doctor will work with you to find the right plan.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
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Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 31, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.