左心房から肺静脈への電気生理学的突破
M Haïssaguerre1, D C Shah, P Jaïs
1Hôpital Cardiologique du Haut-Lévêque, Bordeaux-Pessac, France.
Circulation
|November 15, 2000
まとめ
心房細動に対する肺静脈 (PV) 切除は,必ずしも全PV周りを対象とするのではなく,特定の突破点をターゲットにすることで達成できます. このアプローチは,効率的な電気断絶を可能にし,心拍不全の再発を軽減します.
科学分野:
- 電気生理学 電気生理学
- 心臓病学 心臓病学
- 医療機器技術 医療機器技術について
背景:
- 動脈動 (AF) の肺静脈 (PV) 電気断絶における骨格切除の正確な程度を決定することは,依然として不明確です.
- AFを誘発するPVの心筋拡張を理解することは,効果的な治療に不可欠です.
研究 の 目的:
- 肺静脈 (PVs) を左心房から電気的に切り離すために必要な骨格切除の程度を調査する.
- atrial fibrillation患者におけるPV断絶を達成するための特定のアブレーション標的を特定する.
主な方法:
- 70人の患者は,シヌスリズムまたは心房ペースの間に10電極カテーテルを使用してPVマッピングを受けました.
- PV断絶を達成するために,最も初期の活性化 (ブレークスルー) を示すセグメントでオスタブルアブレーションが行われました.
- PVポテンシャルの周回分布とアクティベーションシーケンス解析 誘導アブレーション戦略.
主要な成果:
- PVポテンシャルは,PV周辺の60-88%に存在し,突破点から連続的に活性化されました.
- 最も早期の活性化部位 (ブレークスルー) をターゲットにすることで,PVポテンシャルを排除したケースもあれば,複数のセグメントでアブレーションを必要とするケースもありました.
- 断絶を達成するために,PVあたり平均4~6人の双極性障害者が対象となり,31人の患者に早期再発があり,しばしば回復した突破部位と関連しています.
結論:
- 特定の突破点での部分周回性アブレーションは,オスティアルPVの切り離しに十分です.
- 肺静脈の筋肉はPV周辺に沿って大きく伸びますが,戦略的アブレーションでは電気的隔離を達成できます.
- 効果的なPV断絶は,左心房からのユニークな突破部位をターゲットにすることで達成できます.
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