Long QT syndrome

Definition

Long QT syndrome (LQTS) is a heart rhythm disorder that can cause fast, chaotic heartbeats. These irregular heartbeats may lead to fainting, seizures, or sudden death if untreated.

5 Must Know Facts For Your Next Test

1. LQTS can be congenital (inherited) or acquired due to medications or electrolyte imbalances.
2. Symptoms of LQTS include palpitations, fainting spells, and seizures which are often triggered by stress or exercise.
3. Electrolyte imbalances such as low potassium or magnesium levels can exacerbate LQTS symptoms.
4. Beta-blockers and lifestyle changes are common treatments for managing LQTS.
5. A prolonged QT interval on an electrocardiogram (ECG) is the primary diagnostic indicator of LQTS.

Review Questions

• What are common triggers for symptoms in Long QT syndrome?
• How can electrolyte imbalances impact Long QT syndrome?
• What is the primary method for diagnosing Long QT syndrome?

Related terms

Arrhythmia: A condition in which the heart beats with an irregular or abnormal rhythm.

Beta-blockers: A class of medications used to manage abnormal heart rhythms and protect the heart from overexertion.

Electrocardiogram (ECG): A test that measures the electrical activity of the heartbeat to detect abnormalities.