What it is
SVT is not usually life threatening. Some people can stop an episode with simple techniques such as blowing hard into a closed fist or syringe.
Medicines can prevent episodes, and a procedure called catheter ablation can often cure it.
Common signs
- A sudden fast or pounding heartbeat
- Feeling dizzy or lightheaded
- Shortness of breath
- Chest discomfort
- Feeling anxious
- Fainting, rarely
How it is usually diagnosed
- ECG, ideally during an episode
- A heart monitor worn for days
- Echocardiogram
Records worth keeping
Keeping these together makes each appointment easier, especially when you see a new doctor:
- ECG recordings
- Heart monitor reports
- Cardiology letters
- Ablation procedure notes
Questions to ask your doctor
- How can I stop an episode myself?
- Would ablation suit me?
- What triggers should I avoid?
When to get help right away
Call 112 or go to the nearest emergency department if you have:
- A fast heartbeat with chest pain, fainting or severe breathlessness, or an episode that does not stop: call 112
This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.