Electrophysiologic findings of a patient with inappropriate sinus tachycardia cured by selective radiofrequency catheter ablation

T. Sato, H. Mitamura, M. Murata, K. Shinagawa, S. Miyoshi, H. Kanki, S. Takatsuki, K. Soejima, T. Miyazaki, S. Ogawa

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Abstract

Radiofrequency catheter ablation (RFCA) for inappropriate sinus tachycardia (IST) is associated with a high recurrence rate and sometimes requires pacemaker implantation, especially after extensive ablation. We report a patient with drug-refractory IST who was successfully treated by selective RFCA to the 2 earliest activation sites. During tachycardia, the earliest atrial activation preceded the surface P wave by 50 ms or more, whereas it was only 27 ms for the rest of the right atrium after ablation. Our patient had the longest activation period during tachycardia among the reported patients. In IST patients, a longer activation time at the site of the earliest atrial activation may imply that the abnormality is confined to a small area within the sinus node and may predict the efficacy of selective RFCA.

Original languageEnglish
Pages (from-to)381-386
Number of pages6
JournalJournal of Electrocardiology
Volume33
Issue number4
DOIs
Publication statusPublished - 2000 Jan 1

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Keywords

  • Focal abnormal automaticity
  • Inappropriate sinus tachycardia
  • Radiofrequency catheter ablation

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Sato, T., Mitamura, H., Murata, M., Shinagawa, K., Miyoshi, S., Kanki, H., Takatsuki, S., Soejima, K., Miyazaki, T., & Ogawa, S. (2000). Electrophysiologic findings of a patient with inappropriate sinus tachycardia cured by selective radiofrequency catheter ablation. Journal of Electrocardiology, 33(4), 381-386. https://doi.org/10.1054/jelc.2000.9648