Acute Performance of Steroid-Eluting Screw-In Leads for Atrial Free Wall Pacing

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概要

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• The aim of this study was to clarify the acute performance of steroid-eluting screw-in leads in comparison with that of nonsteroid screw-in leads for atrial free wall pacing. In 114 cases(68 males, 46 females, average age 70 years)with atrial free wall pacing by screw-in leads, pacing thresholds and P-wave amplitudes were compared at the time of implantation and 1 week later between 68 cases of nonsteroid and 46 cases of steroid-eluting screw-in leads. No significant differences were seen between the 2 groups at implantation in either voltage or current thresholds measured at pulse widths of 0.1, 0.3, 0.6, 1.0, 2.0 ms, or P-wave amplitudes. Pulse width thresholds at outputs of 2.5 V and 5.0 V were significantly lower for steroid leads 1 week after implantation(2.5 V:0.34±0.27 ms nonsteroid vs 0.12±0.08 ms steroid, p<0.001;5.0 V:0.12±0.08 ms nonsteroid vs 0.06±0.02 ms steroid, P<0.01). P-wave amplitudes after 1 week were significantly higher for steroid leads(2.6±0.7 mV nonsteroid vs 3.0±1.2 mV steroid, p<0.001).Threshold rise, including pacing failure, was observed in 15(22%)of the non-steroid leads, but in only 1(2%)of the steroid leads. In conclusion, steroid-eluting serew-in leads suppress the acute rise of pacing thresholds in the right atrial free wall and their acute performance is better than that of non-steroid leads. These results suggest that appropriate low-output atrial pacing is feasible immediately after implantation.

• 社団法人日本循環器学会の論文
• 1999-06-20

著者

• YASUDA Masayuki

  Department of Cardiology, Juntendo University School of Medicine

• Yamaguchi Hiroshi

  Department Of Cardiology Juntendo University

• Yamaguchi Hiroshi

  Juntendo Urayasu Hospital

• YAMAGUCHI Hiroshi

  順天堂大学医学部 循環器内科

• Sumiyoshi Masataka

  Department Of Cardiology Juntendo University Nerima Hospital

• Nakata Yasuro

  Department Of Cardiology Juntendo University Urayasu Hospital

• Nakazato Yuji

  Cardiovascular Medicine Juntendo University Urayasu Hospital

• Mineda Yoriaki

  Department Of Cardiology Juntendo University Shizuoka Hospital

• Sumiyoshi Masataka

  Juntendo Shizuoka Hospital

• Nakata Yasuro

  Juntendo Izu-Nagaoka Hospital

• Yasuda Masayuki

  Department Of Cardiology Juntendo University School Of Medicine

• Nakazato Yuji

  Juntendo University School of Medicine

• Mineta Yoriaki

  Juntendo University School of Medicine

• Nakazato Kaoru

  Juntendo University School of Medicine

• Yasuda Masayuki

  Juntendo University School of Medicine

• Nakata Yasuro

  Cardiology Dept. Of Internal Medicine Juntendo University

• Nakazato Kaoru

  Department Of Cardiology Juntendo University School Of Medicine

• Nakata Yasuro

  Division Of Cardiology Department Of Internal Medicine School Of Medicine Juntendo University

• Yamaguchi Hiroshi

  Juntendo University School Of Medicine

• Yamaguchi Hiroshi

  Departments Of Physiology Juntendo University

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