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ドップラー派生エジェクション内静脈内圧グラディエントは,左心室内静脈室機能の信頼性の高い評価を提供します
Raquel Yotti1, Javier Bermejo, M Mar Desco
1Department of Cardiology, Hospital General Universitario Gregorio Marañón, 28007 Madrid, Spain.
Circulation
|September 21, 2005
まとめ
ドップラー誘導射出室内圧差 (EIVPDs) は,左心室内静脈機能を評価するための非侵襲的な方法を提供します. これらの測定は,再現可能であり,負荷状態から比較的独立しており,確立された方法と良好に相関しています.
科学分野:
- 心血管生理学 心血管の生理学
- エコーカルディオグラフィー エコーカルディオグラフィー
- 非侵襲的ヘモダイナミクス
背景:
- 左心室 (LV) から発生するシストリック力は,エジェクション内心室内圧差を生成する.
- カラードップラーMモード (CDMM) は,LV頂点と流出経路間の射出室内圧差 (EIVPD) の非侵襲的な測定を可能にします.
研究 の 目的:
- 縮室機能の非侵襲的指標としてドップラー派生EIVPDを評価する.
主な方法:
- ミニピッグのCDMM画像と圧力-体積信号の同時取得.
- CDMMの記録から慣性,コンベクト,および総EIVPD曲線の計算.
- カヴァルと大動脈閉塞マニュアルの経由で負荷依存性の評価.
主要な成果:
- ピークEIVPDは,圧力-体積ベースの心筋機能指数 (例えば,ピーク弾性R>0.98) と強く相関しています.
- ピーク慣性EIVPDは,シストリック機能指数と高い相関関係 (R>0.75) も示した.
- EIVPDは,従来の測定法とは異なり, cavalおよび大動脈閉塞の際に相対的な負荷独立性を示しました.
結論:
- ドップラー系EIVPDは,全身シストリック機能の定量的で,再現可能で,比較的負荷独立の測定値である.
- これらの指標は,心臓のパフォーマンスを評価するための確立された基準方法と密接に相関しています.
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