Detour conduction can mimic complete conduction block at the cavo-tricuspid isthmus

Academic Article


  • A 54-year-old man with typical atrial flutter underwent linear ablation at the cavo-tricuspid isthmus. Though standard tricuspid annulus (TA) mapping and differential pacing suggested complete isthmus conduction block, electroanatomic mapping revealed that detoured conduction through a residual conduction gap around the inferior vena cava far from the TA mimicked complete conduction block. Though the double potential interval along the block line was not long enough to guarantee a complete line of block after eliminating the conduction gap, electroanatomic remapping accurately confirmed a complete block line, suggesting electroanatomic mapping may be the most reliable method to confirm complete isthmus conduction block. © 2007, The Authors.
  • Published In

    Digital Object Identifier (doi)

    Author List

  • Yamada T; Murakami Y; Plumb VJ; Kay GN
  • Start Page

  • 140
  • End Page

  • 142
  • Volume

  • 30
  • Issue

  • 1