Long QT syndrome - Symptoms and causes - Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/long-qt-syndrome/symptoms-causes/syc-20352518
WebJan 12, 2024 · In long QT syndrome, the heart's electrical system takes longer than usual to recharge between beats. This delay is called a prolonged QT interval. It may be seen on an electrocardiogram (ECG). Long QT syndrome is often grouped into two main categories, depending on the cause. If you are born with the condition, it's called congenital long QT ...
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