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Visualisation of activation and repolarisation in congenital long QT syndrome
  1. W Shimizu,
  2. K Satomi,
  3. S Kamakura
  1. wshimizu{at}

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A three dimensional electroanatomic mapping system (CARTO, Biosense Webster) can visualise the activation sequence during normal or abnormal rhythm, and has recently been used as a guide for catheter ablation for some tachyarrhythmias. Activation time at each site is measured from a bipolar (or a unipolar) electrogram and is determined as the interval between the QRS onset and the time minimum of the first derivative (Vmin) of the QRS deflection. On the other …

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