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A 15-year-old girl presented to the emergency room after a prolonged episode of seizures following a dental intervention. This episode had been preceded the same day by an episode of dizziness and pre-syncope during a small effort.On admission, the electrocardiogram (ECG) showed sinus rhythm with a heart rate of 65 bpm, a short duration of the interval PR (102 ms), a QRS axis of 90°, and an important QT prolongation. The QT interval was 577 ms with a corrected QT interval (QTc) of 590 ms. Electrolytes were completely normal. The echocardiogram performed after the admission to the hospital revealed normal left ventricular function with no structural abnormalities. During the first …

european heart journal

Electrocardiographic evidence of transient reverse remodelling of ventricular repolarization after prolonged recurrent episodes of torsade de pointes in a patient with congenital long QT syndrome