Long qt syndrome
Long QT Syndrome
Long QT Syndrome (LQTS) is a rare inherited or acquired heart condition characterized by a prolonged QT interval on the ECG. The QT interval represents the time it takes for the heart's muscle cells to depolarize and then repolarize, or in simpler terms, to contract and then relax.
Pronunciation
The term is pronounced as "long cue-tee syndrome".
Etymology
The term "Long QT Syndrome" is derived from the distinctive prolonged QT interval seen on an ECG of affected individuals. The "QT" refers to the Q and T waves on the ECG, and "long" refers to the prolongation of the interval between these waves.
Symptoms
Symptoms of Long QT Syndrome may include syncope, seizures, and sudden death due to ventricular fibrillation. These symptoms are often triggered by exercise or stress.
Causes
Long QT Syndrome can be inherited, known as congenital Long QT Syndrome, or acquired, often as a side effect of certain medications. Congenital Long QT Syndrome is caused by mutations in genes that regulate heart's electrical activity.
Diagnosis
Diagnosis of Long QT Syndrome is based on the clinical symptoms, family history, and ECG findings. Genetic testing may also be performed to identify gene mutations associated with the condition.
Treatment
Treatment for Long QT Syndrome may include medications like beta blockers, devices like implantable cardioverter defibrillators, and lifestyle modifications to avoid triggers.
Related Terms
- QT interval
- Electrocardiogram
- Ventricular fibrillation
- Beta blocker
- Implantable cardioverter-defibrillator
External links
- Medical encyclopedia article on Long qt syndrome
- Wikipedia's article - Long qt syndrome
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