室細動の空間時間的な進化
F X Witkowski1, L J Leon, P A Penkoske
1Department of Medicine, University of Alberta, Edmonton, Canada. fwitkows@gpu.srv.ualberta.ca
Nature
|March 24, 1998
まとめ
心臓発作による突然死は,しばしば心房細動によって引き起こされます. この研究では,先端のマッピング技術を使用して,犬の心臓の早期心房細動中に一時的に噴出するローターを容易に検出しました.
科学分野:
- 心血管生理学 心血管の生理学
- 電気生理学 電気生理学
- 心律不整症とは,心律不整症のことです.
背景:
- 心臓発作による突然死は,世界的に主要な死因であり,主に心房細動によるものです.
- 静脈細動は,生命を脅かす混沌とした心拍です.
- ローター,またはスパイラル波は心律不整に絡み合っているが,細動する心室では検出が困難である.
研究 の 目的:
- 室細動の初期段階におけるローターの存在と特徴を調査する.
- 心臓の電気生理学的現象を検出するための高解像度マッピング技術を開発し,適用する.
主な方法:
- 実験的な研究のために,分離された,浸透された犬の心臓を使用しました.
- 光学トランスメブランポテンシャルの高空間および時間解像度マッピングを使用した.
- 空間時間交差相関と波長のダイナミクスを分析した.
主要な成果:
- 静脈細動の初期段階において,一時的に噴出するロータを成功裏に検出した.
- この初期のローター活動を特徴づける高い空間時間交差相関が観察されました.
- この期間に頻度の高い波面衝突と波折発生が記録されている.
- Epicardial rotorの表れのない空間的に相関が少ないメカニズムへの進化を指摘した.
結論:
- 高解像度の光学マッピングにより,早期の心房細動でローターを容易に検出できます.
- ローターは,早期心房細動の重要な特徴であり,高い時空相関に関連しています.
- 心筋動の動態は,回転器の活動と空間的相関の変化とともに,時間とともに進化する.
関連する概念動画
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