QT prolongation
QT Prolongation
QT prolongation (/ˈkjuː tiː prəˌlɒŋˈɡeɪʃən/) is a medical condition that can cause serious arrhythmias, or irregular heart rhythms. It is characterized by an extended QT interval on an electrocardiogram (ECG).
Etymology
The term "QT" refers to the Q and T waves on an ECG, which represent the depolarization and repolarization of the ventricles, respectively. "Prolongation" refers to the lengthening of the time interval between these two events.
Causes
QT prolongation can be caused by various factors, including certain medications, electrolyte imbalances, and genetic conditions such as Long QT syndrome. Some medications known to cause QT prolongation include certain antibiotics, antidepressants, and antiarrhythmic drugs.
Symptoms
Symptoms of QT prolongation may include palpitations, fainting, and in severe cases, sudden death due to ventricular fibrillation.
Diagnosis
Diagnosis of QT prolongation is typically made through an ECG, which can measure the QT interval. Additional tests may be performed to determine the underlying cause of the condition.
Treatment
Treatment for QT prolongation typically involves addressing the underlying cause, such as changing medications or treating electrolyte imbalances. In some cases, patients may be prescribed beta blockers or other medications to manage their symptoms.
See also
External links
- Medical encyclopedia article on QT prolongation
- Wikipedia's article - QT prolongation
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