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Updated: May 12, 2026

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心不全および左ブンデル・ブランチ・ブロックの患者における左心室活性化の特徴

Angelo Auricchio¹, Cecilia Fantoni, Francois Regoli

¹Division of Cardiology, University Hospital, Leipzigerstrasse 44, D-39120 Magdeburg, Germany. angelo.auricchio@medizin.uni-magdeburg.de

|March 3, 2004

まとめ

左心室 (LV) の U 形の活性化パターンは,左ブンドル・ブランチ・ブロック (LBBB) の患者における機能的なブロックラインによって引き起こされます. 非接触マッピングは,心臓再同期療法のための最適な部位を特定するのに役立ちます.

科学分野:

心臓病学心臓病学
電気生理学電気生理学
メディカルイマージング (医学イメージング)

背景:

拡張左心室 (LV) と左束枝ブロック (LBBB) の従来の活性化マッピングは,記録場所の可用性と精度によって制限されています.
精密なLV活性化マッピングは,心不全の病理生理学を理解し,治療を導くために重要である.

研究の目的:

心不全の患者およびLBBB形態学のLV活性化配列を調査する.
LVのアクティベーションパターンの特徴づけにおける3Dコンタクトと非コンタクトのマッピングの有用性を評価する.
機能ブロック線がLV活性化に与える影響と,心臓再同期療法におけるその潜在的な役割を特定する.

主な方法:

3Dコンタクトマッピングと非コンタクトマッピングを同時に実施し,心不全とLBBBの24人の患者を対象とした.
LVのアクティベーションシーケンスが,内在リズムと非同期ペースで研究されました.
導電ブロック線の位置と機能的振る舞いを分析した.

主要な成果:

ほとんどの患者で"U形"の活性化波面が観察されました.
ブロックラインは前面,横面,または下部に位置し,QRSとアクティベーションの持続時間に影響を与えました.
ブロックラインの位置における機能的変化は,非同期ペースで示された.

結論:

LVの機能的なブロックラインによってU形の伝導パターンが課され,アクティベーション時間が延長されます.
非接触マッピングは,機能的ブロックを効果的に評価し,心臓再同期療法のための最適な標的を特定するのに役立ちます.

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