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Adjustment of the Early Meets Late Module to Differentiate the Active Circuit of a Dual Loop Reentrant Atrial Tachycardia
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  • Shu Hirata,
  • Koichi Nagashima,
  • Yuji Wakamatsu,
  • Naoto Otsuka,
  • Seina Yagyu,
  • Sayaka Kurokawa,
  • Yasuo Okumura
Shu Hirata
Nihon University School of Medicine, Division of Cardiology, Department of Medicine
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Koichi Nagashima
Nihon University School of Medicine
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Yuji Wakamatsu
Nihon University School of Medicine Graduate School of Medicine
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Naoto Otsuka
Nihon University School of Medicine
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Seina Yagyu
Nihon University School of Medicine
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Sayaka Kurokawa
Nihon University School of Medicine
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Yasuo Okumura
Nihon University School of Medicine
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Abstract

In dual loop reentrant ATs, the differentiation of the active circuit from the passive circuit in a dual loop reentry is still challenging. In such complicated AT cases, entrainment pacing is useful for determining the dominant circuit. However, we differentiated the active circuit by an AT activation map with an adjustment of the lower threshold value in the early meets late module. We also detected the gap of the previous PVI line by the same map with a further adjustment of the lower threshold value. The adjustment of the lower threshold might be advantageous for differentiating an active circuit of a dual loop reentry as well as gaps along the PVI line.