静脈性タヒカルディアの脱出部位は,心筋リナーヴェーションゾーン内にあることが,心筋不全性心筋症の血液動力学的安定性を予測します
Jorge L Reyes1,2, Darshan Krishnappa1, Lucy Q Lin3
1Advanced Interventional Cardiac Electrophysiology, LAA Closure Program, Cardiovascular Division, Minneapolis VA Health Care System, University of Minnesota, Minneapolis, MN, 55417, USA.
まとめ
静脈動脈短拍 (VT) 出口部位は,中央の傷跡地帯の近くにあり,血動力学的不安定性を予測します. ペリインファクトの境界地帯の出口は,安定したVTと関連しており,リスクの分層化とアブレーション戦略を支援しています.
科学分野:
- 心臓病学 心臓病学
- 電気生理学 電気生理学
- 心臓外科手術について
背景:
- 静脈性心拍動 (VT) 中の血液動力学的安定性は,成功するマッピングとアブレーションに不可欠です.
- 発血性痕介動性VTは,潜在的血液動力学的な妥協のために,重要な課題を提示します.
研究 の 目的:
- 血液動力学的安定性に対する,異なる心筋痕領域内のVT出口部位の位置の影響を調査する.
- 傷痕ゾーンの特徴が,不血性VTの血液動力学的安定性に影響するかどうかを判断する.
主な方法:
- エレクトロアナトミックマッピングとカテーテルアブレーションを用いて,27人の不血性痕媒介性VT患者で51人のVTを分析した.
- 双極電圧に基づいて,VT出口部位を中央傷痕ゾーン (CSZ) または心筋梗塞周辺境界ゾーン (PIBZ) に分類する.
- 血液動力学的安定性の定義と多変数ロジスティック回帰を用いた予測者の識別.
主要な成果:
- VTsの58.8%が血液動力学的に不安定でした.
- 安定したVTsは主にPIBZ (81%) から生じたが,不安定なVTsはしばしばCSZ (19%) から生じた.
- CSZの出口部位の位置は,血液動力学的不安定性 (OR 6.8,P = 0.02) を独立に予測し,不安定なVTsは,低エジェクション分数と短いサイクルの長さを示した.
結論:
- 心筋痕領域に対するVT出口部位の位置は,血液動力学的安定性の独立した予測因子です.
- 中央の傷痕ゾーンの出口は,血液動力学的不安定性と関連しているが,心筋梗塞周辺の境界ゾーンの出口は,安定性と相関している.
- 発見は,不血性VTにおけるリスク層分化とアブレーション戦略に影響を与える差異的リナーベーションと機械的力を示唆しています.
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