Double potential interval and transisthmus conduction time for prediction of cavotricuspid isthmus block after ablation of typical atrial flutter

Ching Tai Tai, Azizul Haque, Yung Kuo Lin, Hsuan Ming Tsao, Yu An Ding, Mau Song Chang, Shih Ann Chen

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Background: Complete bi-directional isthmus block is the endpoint of typical atrial flutter ablation. The purpose of this study was to investigate the feasibility of the local double potential (DP) interval and the change in transisthmus conduction time for predicting complete isthmus block after ablation of the cavotricuspid isthmus. Methods: The study population consisted of 32 patients with typical atrial flutter after a procedure of radiofrequency (RF) ablation of the cavotricuspid isthmus (16 had incomplete block and 16 had complete block). The transisthmus conduction time was determined during pacing from the proximal coronary sinus and low lateral right atrium before and after RF ablation. The DP interval close to the ablation line was evaluated after final RF energy application. Results: In the counterclockwise direction, transisthmus conduction time had an increase of 37 ± 25.4% and 127.3 ± 35.5% (P <0.001), and the DP interval was 63.3 ± 8.7 ms and 120 ± 17.4 ms (P <0.001) after achievement of incomplete and complete block, respectively. The sensitivity, specificity, positive and negative predictive values of an increase in the transisthmus conduction time ≥50% were 100%, 81%, 84% and 100%, respectively; those of DP interval ≥100 ms were 100%. In the clockwise direction, transisthmus conduction time had an increase of 38.8 ± 28.6% and 135.7 ± 63.6% (P<0.001), and the DP interval was 63.6 ± 13.8 ms and 127.7 ± 27.1 ms (P <0.001) after achievement of incomplete and complete block, respectively. The sensitivity, specificity, positive and negative predictive values of an increase in the transisthmus conduction time ≥50% were 100%, 67%, 83% and 100%, respectively; those of the DP interval ≥100 ms were 100%. Conclusions: The transisthmus conduction time ≥50% increase or DP interval ≥100 ms was feasible to predict complete bi-directional isthmus block.

Original languageEnglish
Pages (from-to)77-82
Number of pages6
JournalJournal of Interventional Cardiac Electrophysiology
Volume7
Issue number1
DOIs
Publication statusPublished - Aug 2002
Externally publishedYes

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Atrial Flutter
Sensitivity and Specificity
Coronary Sinus
Heart Atria
Population

Keywords

  • Atrial flutter
  • Catheter ablation

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Double potential interval and transisthmus conduction time for prediction of cavotricuspid isthmus block after ablation of typical atrial flutter. / Tai, Ching Tai; Haque, Azizul; Lin, Yung Kuo; Tsao, Hsuan Ming; Ding, Yu An; Chang, Mau Song; Chen, Shih Ann.

In: Journal of Interventional Cardiac Electrophysiology, Vol. 7, No. 1, 08.2002, p. 77-82.

Research output: Contribution to journalArticle

Tai, Ching Tai ; Haque, Azizul ; Lin, Yung Kuo ; Tsao, Hsuan Ming ; Ding, Yu An ; Chang, Mau Song ; Chen, Shih Ann. / Double potential interval and transisthmus conduction time for prediction of cavotricuspid isthmus block after ablation of typical atrial flutter. In: Journal of Interventional Cardiac Electrophysiology. 2002 ; Vol. 7, No. 1. pp. 77-82.
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abstract = "Background: Complete bi-directional isthmus block is the endpoint of typical atrial flutter ablation. The purpose of this study was to investigate the feasibility of the local double potential (DP) interval and the change in transisthmus conduction time for predicting complete isthmus block after ablation of the cavotricuspid isthmus. Methods: The study population consisted of 32 patients with typical atrial flutter after a procedure of radiofrequency (RF) ablation of the cavotricuspid isthmus (16 had incomplete block and 16 had complete block). The transisthmus conduction time was determined during pacing from the proximal coronary sinus and low lateral right atrium before and after RF ablation. The DP interval close to the ablation line was evaluated after final RF energy application. Results: In the counterclockwise direction, transisthmus conduction time had an increase of 37 ± 25.4{\%} and 127.3 ± 35.5{\%} (P <0.001), and the DP interval was 63.3 ± 8.7 ms and 120 ± 17.4 ms (P <0.001) after achievement of incomplete and complete block, respectively. The sensitivity, specificity, positive and negative predictive values of an increase in the transisthmus conduction time ≥50{\%} were 100{\%}, 81{\%}, 84{\%} and 100{\%}, respectively; those of DP interval ≥100 ms were 100{\%}. In the clockwise direction, transisthmus conduction time had an increase of 38.8 ± 28.6{\%} and 135.7 ± 63.6{\%} (P<0.001), and the DP interval was 63.6 ± 13.8 ms and 127.7 ± 27.1 ms (P <0.001) after achievement of incomplete and complete block, respectively. The sensitivity, specificity, positive and negative predictive values of an increase in the transisthmus conduction time ≥50{\%} were 100{\%}, 67{\%}, 83{\%} and 100{\%}, respectively; those of the DP interval ≥100 ms were 100{\%}. Conclusions: The transisthmus conduction time ≥50{\%} increase or DP interval ≥100 ms was feasible to predict complete bi-directional isthmus block.",
keywords = "Atrial flutter, Catheter ablation",
author = "Tai, {Ching Tai} and Azizul Haque and Lin, {Yung Kuo} and Tsao, {Hsuan Ming} and Ding, {Yu An} and Chang, {Mau Song} and Chen, {Shih Ann}",
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T1 - Double potential interval and transisthmus conduction time for prediction of cavotricuspid isthmus block after ablation of typical atrial flutter

AU - Tai, Ching Tai

AU - Haque, Azizul

AU - Lin, Yung Kuo

AU - Tsao, Hsuan Ming

AU - Ding, Yu An

AU - Chang, Mau Song

AU - Chen, Shih Ann

PY - 2002/8

Y1 - 2002/8

N2 - Background: Complete bi-directional isthmus block is the endpoint of typical atrial flutter ablation. The purpose of this study was to investigate the feasibility of the local double potential (DP) interval and the change in transisthmus conduction time for predicting complete isthmus block after ablation of the cavotricuspid isthmus. Methods: The study population consisted of 32 patients with typical atrial flutter after a procedure of radiofrequency (RF) ablation of the cavotricuspid isthmus (16 had incomplete block and 16 had complete block). The transisthmus conduction time was determined during pacing from the proximal coronary sinus and low lateral right atrium before and after RF ablation. The DP interval close to the ablation line was evaluated after final RF energy application. Results: In the counterclockwise direction, transisthmus conduction time had an increase of 37 ± 25.4% and 127.3 ± 35.5% (P <0.001), and the DP interval was 63.3 ± 8.7 ms and 120 ± 17.4 ms (P <0.001) after achievement of incomplete and complete block, respectively. The sensitivity, specificity, positive and negative predictive values of an increase in the transisthmus conduction time ≥50% were 100%, 81%, 84% and 100%, respectively; those of DP interval ≥100 ms were 100%. In the clockwise direction, transisthmus conduction time had an increase of 38.8 ± 28.6% and 135.7 ± 63.6% (P<0.001), and the DP interval was 63.6 ± 13.8 ms and 127.7 ± 27.1 ms (P <0.001) after achievement of incomplete and complete block, respectively. The sensitivity, specificity, positive and negative predictive values of an increase in the transisthmus conduction time ≥50% were 100%, 67%, 83% and 100%, respectively; those of the DP interval ≥100 ms were 100%. Conclusions: The transisthmus conduction time ≥50% increase or DP interval ≥100 ms was feasible to predict complete bi-directional isthmus block.

AB - Background: Complete bi-directional isthmus block is the endpoint of typical atrial flutter ablation. The purpose of this study was to investigate the feasibility of the local double potential (DP) interval and the change in transisthmus conduction time for predicting complete isthmus block after ablation of the cavotricuspid isthmus. Methods: The study population consisted of 32 patients with typical atrial flutter after a procedure of radiofrequency (RF) ablation of the cavotricuspid isthmus (16 had incomplete block and 16 had complete block). The transisthmus conduction time was determined during pacing from the proximal coronary sinus and low lateral right atrium before and after RF ablation. The DP interval close to the ablation line was evaluated after final RF energy application. Results: In the counterclockwise direction, transisthmus conduction time had an increase of 37 ± 25.4% and 127.3 ± 35.5% (P <0.001), and the DP interval was 63.3 ± 8.7 ms and 120 ± 17.4 ms (P <0.001) after achievement of incomplete and complete block, respectively. The sensitivity, specificity, positive and negative predictive values of an increase in the transisthmus conduction time ≥50% were 100%, 81%, 84% and 100%, respectively; those of DP interval ≥100 ms were 100%. In the clockwise direction, transisthmus conduction time had an increase of 38.8 ± 28.6% and 135.7 ± 63.6% (P<0.001), and the DP interval was 63.6 ± 13.8 ms and 127.7 ± 27.1 ms (P <0.001) after achievement of incomplete and complete block, respectively. The sensitivity, specificity, positive and negative predictive values of an increase in the transisthmus conduction time ≥50% were 100%, 67%, 83% and 100%, respectively; those of the DP interval ≥100 ms were 100%. Conclusions: The transisthmus conduction time ≥50% increase or DP interval ≥100 ms was feasible to predict complete bi-directional isthmus block.

KW - Atrial flutter

KW - Catheter ablation

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