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Supraventricular Tachycardia (SVT)
Episodes of a very fast heart rate starting in the upper chambers of the heart. They can be alarming but are usually not life-threatening.
Causes & risk factors
- Extra electrical pathways in the heart
- Caffeine, alcohol or stimulants
- Stress or lack of sleep
- Thyroid problems
- Sometimes no clear trigger
Common symptoms
Tests & diagnosis
- ECG
- Holter / event monitor
- Thyroid function
- Electrolytes
Treatment & management
- Simple vagal manoeuvres to slow the heart during an episode
- Avoiding caffeine and other triggers
- Medicines to control or prevent episodes
- Catheter ablation, which can cure many cases
When to see a doctor urgently
- Call emergency services for palpitations with fainting, chest pain or severe breathlessness
- See a cardiologist for recurrent racing-heart episodes
- Learn vagal manoeuvres from your doctor for short episodes
Not a diagnosis. MedDroid gives general educational information about supraventricular tachycardia (svt). It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
Is SVT dangerous?
For most people it is not life-threatening, but frequent or severe episodes should be treated.
Can SVT be cured?
Catheter ablation cures the majority of suitable cases.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.