What it is
Some people with long QT syndrome never have symptoms.
Treatment includes beta-blockers, avoiding medicines that prolong the QT interval, and sometimes an implantable defibrillator. Family members may be offered testing.
Common signs
- Fainting, often during exercise, excitement or a sudden loud noise
- Seizures
- Palpitations
- Often no symptoms
How it is usually diagnosed
- ECG
- Heart rhythm monitoring
- Exercise test
- Genetic testing
Records worth keeping
Keeping these together makes each appointment easier, especially when you see a new doctor:
- ECGs showing QT measurements
- Genetic test results
- Cardiology letters
- A list of medicines to avoid
Questions to ask your doctor
- Which medicines should I avoid?
- Should my family be tested?
- Is it safe to exercise?
When to get help right away
Call 112 or go to the nearest emergency department if you have:
- Fainting during exercise or with a sudden noise, or someone collapsing and not breathing normally: call 112 and start CPR
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.