Clinical, electrophysiological characteristics, and radiofrequency catheter ablation of atrial tachycardia near the apex of Koch's triangle

Ling Ping Lai, Jiunn Lee Lin, Ting Fu Chen, Wen Chin Ko, Wen Pin Lien

研究成果: 雜誌貢獻文章同行評審

56 引文 斯高帕斯(Scopus)

摘要

Atrial tachycardia, with its focus near the apex of Koch's triangle, may carry a potential risk of atrioventricular block during radiofrequency catheter ablation. The efficacy and safety of this procedure have never been addressed. The characteristics and catheter ablation results are reported for six patients with atrial tachycardia near the apex of Koch's triangle. All six patients were female aged 49.6 ± 9.3 years (range 39-63). Organic heart disease was present in 3 (50%) of the 6 patients. The P wave in surface ECG had a mean axis of - 28°(range - 90°- + 30°) in the frontal plane. The catheter ablation was guided by activation sequence mapping. The energy was titrated from low power level. Atrial overdrive pacing was used to monitor the atrioventricular conduction should accelerated junctional rhythm occur. At the final successful ablation site, the local atrial activation was 41.8 ± 9.1 ms before the P wave and His-bundle potential was present in 5 of the 6 patients. All patients had their atrial tachycardia eliminated without recurrence or heart black during a follow-up period of 17.7 ± 8.5 months (range 6-30). In conclusion, atrial tachycardia near the apex of Koch's triangle has distinct clinical and electrophysiological features. Radiofrequency catheter ablation can be performed effectively. However, extreme care must be taken to prevent inadvertent atrioventricular block. Titrated energy application and continuous monitoring of atrioventricular conduction are mandatory.
原文英語
頁(從 - 到)367-374
頁數8
期刊PACE - Pacing and Clinical Electrophysiology
21
發行號2
DOIs
出版狀態已發佈 - 三月 10 1998
對外發佈

ASJC Scopus subject areas

  • 心臟病學與心血管醫學

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