Long-QT syndrome (LQTS) is characterized by a prolonged QT interval on 12-lead electrocardiograms (ECGs) that can progress to a polymorphic ventricular tachycardia (VT) known as torsades de pointes.

The QT interval is the time from the beginning of the QRS complex, representing ventricular depolarization, to the end of the T wave, resulting from ventricular repolarization. The normal QT ...

You might not realize it, but most of us are using Qt-powered products every day, with the development tools behind anything from electric toothbrushes, to coffee machines, and even medical devices.

See the ECG Tutorial section on QT interval to learn how this is measured. Multiple medications, electrolyte abnormalities (hypocalcemia, hypomagnesemia and hypokalemia) and certain disease states ...

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A Rock Hill teen is charged with murder in the shooting death of a 16-year-old boy at a QT convenience store Tuesday night, police said. Police arrested Carnell Mike, 17, on charges of murder ...