Novel concept of atrial tachyarrhythmias originating from the superior vena cava: Insight from noncontact mapping

Tu Ying Liu, Ching Tai Tai, Pi Chang Lee, Ming Hsiung Hsieh, Satoshi Higa, Yu An Ding, Shih Ann Chen

Research output: Contribution to journalArticle

26 Citations (Scopus)


Introduction: Information about the activation patterns inside the superior vena cava (SVC) and entry and exit sites at the SVC-right atrial (RA) junction during SVC tachyarrhythmia is limited. Methods and Results: A detailed characterization of electrophysiologic mechanisms and ablation strategies was performed using a noncontact three-dimensional mapping system in two cases of SVC tachycardia. The first case demonstrated SVC tachycardia originating from an ectopic focus inside the SVC, with sustained depolarization and conduction to the atrium. Entry and exit sites across the SVC-RA junction were located very close to each other. The second case demonstrated two different reentrant circuits, one inside the SVC and the other into and out of the SVC-RA junction. The entry and exit sites were located far away from each other. Conclusion: Noncontact mapping may help to reveal the mechanism of SVC tachyarrhythmias and to locate entry and exit sites at the SVC-RA junction as a guide for catheter ablation.

Original languageEnglish
Pages (from-to)533-539
Number of pages7
JournalJournal of Cardiovascular Electrophysiology
Issue number5
Publication statusPublished - May 1 2003
Externally publishedYes



  • Mapping
  • Superior vena cava
  • Tachycardia

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology

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