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Figure 1 Precordial QT (top), heart rate (middle) and plasma dofetilide (bottom) during dofetilide infusion in atrial fibrillation or flutter and after cardioversion to normal sinus rhythm (SR). Group I patients are those in whom the SR infusion was stopped prematurely for excess QT prolongation. Group II patients received the whole dofetilide infusion in SR. *p < 0.01 vs baseline.
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