Long-term follow-up of catheter ablation of ventricular arrhythmias: Experiences from a tertiary referral center in Taiwan

Fa Po Chung, Yenn Jiang Lin, Shih Lin Chang, Li Wei Lo, Yu Feng Hu, Yun Yu Chen, Chuen Wang Chiou, Shih Ann Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Background: Radiofrequency catheter ablation (RFCA) is an alternative therapeutic management for drug-refractory ventricular arrhythmias (VA). However, long-term follow-up of clinical outcome after RFCA for VAs in Taiwan remains unknown. Methods: From 1999 to 2013, patients undergoing RFCA for VAs from a single referral center were consecutively enrolled. The annual distribution of cases, clinical characteristics, etiology, disease entity and electrophysiological studies were investigated. The clinical outcomes and recurrences between distinct entities were compared. Results: A total of 502 patients receiving RFCA of VAs were eligible, including 388 patients for idiopathic VAs and 114 for substrate VAs. The annual distribution displayed a tendency towards a gradual increase in ablation cases within 2009-2013 compared with the prior decade (p < 0.001). Acute success was achieved in 453 patients (90.2%), partial success in 3 (0.6%), and failed ablation in 46 (9.2%). During a mean follow-up of 39.77 ± 48.75 months, 126 (25.1%) patients developed recurrences. Kaplan-Meier analysis demonstrated better prognosis after RFCA in patients with idiopathic fascicular VT and RVOT VAs (p < 0.001) and attenuation of the occurrences of sustained VT/VF, ICD therapies, and mortality in patients with BrS and ARVD/C (p = 0.036), as well as overall ICD interventions in substrate VAs (p < 0.001). Conclusions: RFCA could be an effective and alternative strategy in the elimination of idiopathic VAs and prevention of malignant events in substrate VAs at an experienced referral center in Taiwan. Distinct location of arrhythmogenic trigger and disease entities may result in non-uniform recurrences and prognosis.

Original languageEnglish
Pages (from-to)8-17
Number of pages10
JournalActa Cardiologica Sinica
Volume31
Issue number1
DOIs
StatePublished - 1 Jan 2015

Keywords

  • Idiopathic
  • Radiofrequency catheter ablation
  • Recurrence
  • Substrate
  • Ventricular arrhythmias

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