サイズ不足のミトラアヌロプラスティが,左心室壁の線引きと壁の加厚メカニズムに及ぼす影響
Allen Cheng1, Tom C Nguyen, Marcin Malinowski
1Department of Cardiovascular and Thoracic Surgery, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, California 94305-5247, USA.
Circulation
|July 6, 2006
まとめ
サイズが小さかったミトラアヌロプラスティは,繊維の縮小とシートの厚さを損なうことで,前頭根部におけるシストリック壁の厚さを減少させた. この処置は,局所的な心筋力学,特にミトラアヌルスの近くに悪影響を及ぼす可能性があります.
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
- 心臓のメカニズム 心臓のメカニズム
背景:
- サイズ不足のミトラアヌロプラスティは,ミトラア反発 (MR) に使用され,左心室 (LV) の形状を改善することを目的としています.
- 以前の研究によると,ミトラアヌルスの近くのシストリック壁の加厚を阻害する可能性があるという.
- この研究では,地域のトランムラルLV壁メカニズムへの影響を調査しています.
研究 の 目的:
- サイズ不足のミトラアヌロプラスティが,地域のトランスムラルLV壁繊維とシート菌株に及ぼす影響を測定するために.
- アヌロプラスティック手術後のシストリック壁の加厚のメカニズムを分析する.
主な方法:
- 9頭の羊は,放射性不透明のビーズセットを外科手術で,前頭根と横の赤道LV領域に挿入した.
- 4次元ビデオ光学では,ミトラアヌロプラスティック手術前と後のマーカーダイナミクスを追跡しました.
- 横断線 (周回線,縦線,半径線) を計算し,繊維,シート,シート正規の座標に変換した.
主要な成果:
- サイズが小さかったアンヌロプラスティは,すべての深さで前頭根シストリック壁の加厚を50%以上減少させた.
- この減少は,抑制された下腸内臓繊維の縮小と心収縮板の厚みによるものです.
- 繊維シートの延ばしや壁の厚さにおける有意な変化は,遠隔の横の赤道地域では観察されなかった.
結論:
- サイズ不足のミトラアヌロプラスティは,前頭根LV領域のシストリック壁の加厚を急激に抑制します.
- 阻害は,下腸内臓繊維の縮小とラミナーシートの厚さ減少によるものです.
- これらの発見は,小型のアンヌロプラスティが局所的な心筋メカニズムに潜在的に有害な影響を及ぼすことを示唆しています.
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