P Wave Morphology in Inferior Leads May Predict the Higher Recurrence after the Catheter Ablation of Atrial Tachycardia Originating from Para-Hisian Area
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概要
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<B>Background:</B> Radiofrequency catheter ablation (RFCA) for atrial tachycardia (AT) originating from para-Hisian area is usually difficult and with higher recurrence rate because of a risk in atrio-ventricular block. However, parameters predicting the recurrence of RFCA for para-Hisian AT have not been clarified. <B>Methods:</B> The study subjects consisted of consecutive 8 patients undergoing RFCA for para-Hisian AT from May 2008. Successful RFCA site, total RF energy, the distance from successful site to His bundle and the P wave morphology of AT in inferior leads were evaluated. <B>Results:</B> In acute phase, all ATs were successfully treated with RFCA from the anteroseptal wall of right atrium (RA) in 4 pts, and the non-coronary cusp (NCC) in 4 pts. During 1.6±1.1 years, clinical AT had recurred in three patients consisting of 2 terminated from the NCC and 1 from the RA. There were no significant differences in successful CA site, total delivered energy and the distance from successful site to His bundle between the recurrence and non-recurrence groups. However, biphasic morphology of P wave in inferior leads during AT was significantly more frequent in recurrence group than non-recurrence group (3 pts vs 1 pt, respectively: P<0.05). <B>Conclusion:</B> P wave morphology in inferior leads during AT may be a predictor of successful RFCA for para-Hisian AT.
著者
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Tada Hiroshi
Cardiology Department of Internal Medicine, Univercity of Tsukuba Graduate School of Comprehensive H
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Yoshida Kentaro
Cardiology Department of Internal Medicine, University of Tsukuba Graduate School of Comprehensive H
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Sekiguchi Yukio
Cardiology Department Of Internal Medicine University Of Tsukuba Graduate School Of Comprehensive Hu
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Aonuma Kazutaka
Cardiology Department Of Internal Medicine University Of Tsukuba Graduate School Of Comprehensive Hu
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KANESHIRO Takashi
Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba
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Yoshida Kentaro
Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba
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Tada Hiroshi
Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba
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Kaneshiro Takashi
Cardiovascular Division, Graduate School of Comprehensive Human Sciences, University of Tsukuba
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Kaneshiro Takashi
Cardiovascular Division, Institute of Clinical Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba
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