リードレス心臓ペースメーカー留置部位における水平軸は、垂直軸よりもペース刺激QRS幅に影響を与える
Hirotsugu Sato1, Yuichi Hori1,2, Yuta Kimura1
1Department of Cardiology, Dokkyo Medical University Saitama Medical Center, Saitama, Japan.
Pacing and clinical electrophysiology : PACE
|December 22, 2025
まとめ
右室中隔へのリードレス心臓ペースメーカー留置:水平位置はペース刺激QRS幅と相関し、垂直位置は相関しない。ネイティブQRS幅もペース刺激QRSに影響を与えるが、ペース刺激心筋症のリスクについてはさらなる研究が必要である。
科学分野:
- 心臓病学
- 医療機器
- 電気生理学
背景:
- 心尖部中隔へのリードレス心臓ペースメーカー(LP)留置は、ペース刺激心筋症(PICM)と関連している。
- 最適な結果を得るためには、右室(RV)中隔内の正確なLP位置決めが重要である。
- 心機能に対する留置部位の影響を理解することは不可欠である。
研究 の 目的:
- 右室中隔内のリードレス心臓ペースメーカーの最適な留置部位を決定すること。
- LP留置位置とペース刺激QRS幅(p-QRS幅)の関係を調査すること。
- 留置部位とペース刺激心筋症(PICM)との関連を評価すること。
主な方法:
- 3D回転角度法(3D-RA)でガイドされたリードレス心臓ペースメーカー留置を54例の患者で実施した。
- 水平軸と垂直軸を用いて留置部位を正確にマッピングした。
- ペース刺激QRS幅(p-QRS幅)を術中に測定し、心エコー検査で12ヶ月後のPICM進行を評価した。
主要な成果:
- 54例のLPすべてが中隔に正常に留置された。
- 水平留置位置は、p-QRS幅と有意な相関を示した(R=0.59)。
- ネイティブQRS幅は、p-QRS幅延長の独立した予測因子であったが、PICMの進行は観察されなかった。
結論:
- リードレス心臓ペースメーカー留置中の水平右室中隔位置は、垂直位置よりもp-QRS幅の強力な予測因子である。
- ネイティブQRS幅の延長は、p-QRS幅の延長を独立して予測する。
- 留置部位とPICM発生との関連を完全に解明するには、さらなる研究が必要である。
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