Long QT Syndrome history and symptoms
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Overview
More than 2 fainting episodes within 2 years should trigger an EKG evaluation for Long QT Syndrome.
History and Symptoms
History
You should inquire about the following as part of the thistory:
- Persons with a history of repeated fainting episodes or syncope. If there are more than 2 fainting spells in under 2 years, the risk of an aborted SCD or SCD is increased 18 fold.[1]
- Repeated blackouts or fainting spells in the context of the following are due to a malignant arrhythmia until proven otherwise:
- Exertion
- Loud startling noise
- Postpartum syncope
- Seizures
- A prior history of cardiac arrest.
- Family members of persons with repeated fainting, accidents, seizures or a history of cardiac arrest.
- Persons who are on certain medications that are known to cause a prolonged QT interval on electrocardiogram.
- Persons who are first degree relatives of people with know long QT syndrome.
Patients with long QT syndrome may have a positive history of:
Common Symptoms
- [Lightheadedness]]
- Palpitations
- Syncope or presyncope
Less common symptoms
References
- ↑ Hobbs et al. JAMA 296:1249-1254, 2006.