Supraventricular Tachycardia: Sudden Episodes of a Fast Heartbeat
A heartbeat that suddenly races and then settles can be unsettling. Recording the rhythm helps your doctor understand what is happening.
Treatment at a glance
An episode plan
Medicines
Catheter ablation
Some people need only observation. Others benefit from medicines or treatment of the abnormal electrical pathway.
Before your consultation
Use these points to prepare for your consultation.
- Record how abruptly episodes start and stop.
- Note their duration and any possible triggers.
- Bring ECGs recorded during a fast heartbeat.
A fast heartbeat with chest pain, breathlessness or faintness needs emergency care. Seek urgent help if a diagnosed SVT episode lasts longer than usual.
Understanding svt
A heartbeat that suddenly races and then settles can be unsettling. Recording the rhythm helps your doctor understand what is happening.
What it means
SVT describes fast rhythms that start above the heart’s lower chambers. A common pattern is an episode that begins and ends abruptly. It can affect younger people as well as adults and may occur without another heart condition. The frequency and effect of episodes guide treatment.
Symptoms to recognise
A sudden, rapid and often regular heartbeat; Pounding in the chest or neck; Light-headedness, weakness or breathlessness; Chest discomfort during an episode.
Treatment at a glance
Some people need only observation. Others benefit from medicines or treatment of the abnormal electrical pathway.
When to seek care
Arrange review for repeated sudden racing episodes, even if your pulse is normal between them.
Symptoms to recognise
- A sudden, rapid and often regular heartbeat
- Pounding in the chest or neck
- Light-headedness, weakness or breathlessness
- Chest discomfort during an episode
Causes and risk factors
Discuss your medical history and these factors during your assessment.
How it is assessed
The choice of tests depends on your symptoms and the findings of your assessment.
1. Clinical assessment
An ECG taken during an episode can identify the rhythm. A portable monitor may be recommended when episodes are infrequent.
2. Tests and investigations
Selected patients need an electrophysiology study to examine the electrical pathway.
3. Further assessment
Your doctor will decide which tests are useful.
Treatment approaches
Medical care and ongoing management
- An episode plan: A clinician may teach suitable techniques for managing a confirmed SVT episode. Do not attempt neck massage yourself.
- Medicines: Medicines may stop an episode or reduce recurrence. Prolonged or symptomatic episodes may need hospital treatment.
Catheter ablation
An electrical rhythm specialist may recommend ablation for recurrent episodes after discussing the likely benefit and risks.
Ask your specialist about the expected benefits, risks and alternatives for your circumstances.
When to seek care
Enquire about a rhythm assessment for recurring sudden episodes of a fast heartbeat.
Arrange a review
Plan your next consultation
- Arrange review for repeated sudden racing episodes, even if your pulse is normal between them.
Seek urgent care
Do not wait for a routine appointment when urgent warning signs occur.
- A fast heartbeat with chest pain, breathlessness or faintness needs emergency care. Seek urgent help if a diagnosed SVT episode lasts longer than usual.
Not Sure What You Need?
Enquire about a rhythm assessment for recurring sudden episodes of a fast heartbeat.
Talk to Care GuideAre racing-heart episodes interrupting your day?
Contact Mediversal Simran Hospital, Begusarai, about assessment and ask whether a rhythm specialist referral is appropriate.
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