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Related Experiment Videos

Electroanatomic mapping to identify breakthrough sites in recurrent typical human flutter.

J Sra1, A Bhatia, A Dhala

  • 1University of Wisconsin Medical School, St. Luke's Medical Center, Milwaukee, USA.

Pacing and Clinical Electrophysiology : PACE
|November 4, 2000
PubMed
Summary

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Electroanatomic mapping precisely identifies gaps causing recurrent atrial flutter after radiofrequency (RF) ablation. Targeting these gaps with RF ablation successfully eliminates flutter, improving patient outcomes.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Devices

Background:

  • Conventional methods for locating radiofrequency (RF) ablation sites in recurrent atrial flutter have limitations.
  • Identifying breakthrough sites is crucial for successful RF ablation in typical atrial flutter.

Purpose of the Study:

  • To evaluate the effectiveness of electroanatomic mapping in identifying critical gaps at the tricuspid annulus and inferior vena cava (IVC)/eustachian ridge isthmus.
  • To assess the role of precise gap identification in guiding RF ablation for recurrent typical atrial flutter.

Main Methods:

  • Utilized an electroanatomic mapping system (CARTO) to create voltage, activation, and propagation maps in the right atrium of 12 patients.
  • Performed detailed mapping of the tricuspid annulus and IVC/eustachian ridge isthmus to identify ablation gaps.

Related Experiment Videos

  • Targeted identified gaps with RF energy and confirmed flutter elimination through noninducibility and conduction block.

    • Main Results:

    • Electroanatomic mapping precisely identified critical gaps in all 12 patients with recurrent typical atrial flutter.
    • RF ablation targeting these identified gaps resulted in the elimination of atrial flutter in all patients.
    • A low recurrence rate of 8.3% was observed during a mean follow-up of 14.8 months, with one patient responding to amiodarone after ablation failure.

    Conclusions:

    • Electroanatomic mapping is highly effective in precisely locating gaps in ablation lines responsible for recurrent typical atrial flutter.
    • Targeting these gaps at the tricuspid annulus and IVC/eustachian ridge isthmus with RF ablation offers a high success rate.
    • This approach improves outcomes for patients with recurrent typical atrial flutter following initial ablation procedures.