静脈から冠動脈へのバイパス手術のステントベースのアプローチ
Peter Boekstegers1, Philip Raake, Rasul Al Ghobainy
1Department of Internal Medicine I, Grosshadern University Hospital, Munich, Germany. boekstegers@med1.med.uni-muenchen.de
Circulation
|August 21, 2002
まとめ
ステントベースの新しい心室から冠動脈バイパス (VSTENT) 処置は,豚のモデルにおける冠動脈閉塞中に心筋機能と血流を効果的に保存しました.
科学分野:
- 心血管外科手術についてです.
- バイオメディカルエンジニアリング
- 介入性心臓病学 介入性心臓病学
背景:
- 静脈から冠動脈へのバイパス (VCAB) は,実験的な再血管化技術である.
- VCABは主に冠動脈にシストリック血流を供給する.
研究 の 目的:
- VCABを作成するためのステントベースの手順 (VSTENT) の開発と評価.
- 冠動脈狭窄および閉塞の条件下における心筋動脈の血流と機能の保存におけるVSTENTの有効性を評価する.
主な方法:
- 覆われたステント (VSTENT) を,豚のモデルで左心室と左前垂直冠動脈 (LAD) の間に埋め込みました.
- 遠隔 LAD 流量,地域性心筋機能,冠内圧力は,LAD 狭窄と完全閉塞の異なる程度で測定されました.
- VSTENTのポジショニングと,潜在的なバルブ型のダイアストリックメカニズムがフロー保存に与える影響を調査した.
主要な成果:
- VSTENTは,LAD閉塞の3時間の間,ベースラインの純向前フローの70±6%と,地域性心筋機能の71±8%を保持しました.
- 流れの保存はVSTENTの位置によって影響され,弁のようなメカニズムがダイアストール中に存在すると保存が強化されました.
- シストリック流入は,有意なLAD狭窄 (>70%) で優勢であり,平均ダイアストリック冠内圧は,純流量 (r=0.88,P<0.001) と線形的に相関していた.
結論:
- ステントベースの心室から冠動脈へのバイパス (VSTENT) は実現可能な手順です.
- VSTENTは,完全なLAD閉塞の間に,重要な心筋血管の血流と機能を成功裏に保存しました.
- VSTENTの位置づけによって生み出される静止弁のようなメカニズムと,静止動脈の残留静止流と好ましい相互作用は,好ましい結果をもたらします.
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