Heart rhythm : the official journal of the Heart Rhythm Society
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Repolarization abnormality, especially during bradycardia, might be critical for initiation of ventricular fibrillation (VF) in patients with Brugada syndrome (BrS), but the contribution of the rate-dependent repolarization dynamics to the occurrence of VF is still unknown. ⋯ Loss of rate-dependent QT dynamics may be associated with occurrence of VF in BrS.