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Two atrial reentrant tachycardias originating from the superior vena cava: Electrophysiological characteristics and radiofrequency ablation

  • Masahiro Mizobuchi
  • Yoshihisa Enjoji
  • Kensaku Shibata
  • Atsushi Funatsu
  • Itaru Yokouchi
  • Daisuke Kanbayashi
  • Tomoko Kobayashi
  • Shigeru Nakamura
Case Report

Abstract

A case with two different types of atrial reentrant tachycardia of superior vena cava (SVC) origin is presented. Recent clinical studies have shown that the origin of focal atrial tachycardia typically lies in the venous structures connecting to both atria—the coronary sinus, the superior and inferior vena cava, and the pulmonary vein. These foci have atrial muscle fiber extensions which have electrophysiological characteristics essential to generation of focal ectopic firing. However, little is known about reentrant mechanism of these venous structures. In this report, we present a case of two atrial tachycardias (SVT1 and SVT2) independently originating from the SVC. SVT1 had 430 ms of tachycardia cycle length, and SVT2 had 390 ms of tachycardia cycle length. Both of them showed the character of reentry, and their earliest activations were recorded in the SVC. They were successfully eliminated by focal radiofrequency ablation in the SVC.

Keywords

Superior vena cava Reentry Catheter ablation Myocardial sleeve 

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Copyright information

© Springer Science + Business Media, LLC 2006

Authors and Affiliations

  • Masahiro Mizobuchi
    • 1
  • Yoshihisa Enjoji
    • 1
  • Kensaku Shibata
    • 1
  • Atsushi Funatsu
    • 1
  • Itaru Yokouchi
    • 1
  • Daisuke Kanbayashi
    • 1
  • Tomoko Kobayashi
    • 1
  • Shigeru Nakamura
    • 1
  1. 1.Cardiovascular centerKyoto Katsura HospitalKyotoJapan

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