ミトラル弁の置換とミトラル弁の修復. ドップラーと定量的なストレスエコーカルディオグラフィの研究
M D Tischler1, K A Cooper, M Rowen
1Cardiology Unit, Medical Center Hospital of Vermont, Burlington 05401.
Circulation
|January 1, 1994
まとめ
ミトラルバルブ修復 (MVP) は,運動中にミトラルバルブ置換 (MVR) よりもよくエジェクション分子を保持します. MVPはエンドシストリックストレスを軽減し,手術後の心房機能を改善します.
科学分野:
- 心血管外科手術についてです.
- 心臓生理学 心臓生理学
- 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
背景:
- 標準的なミトラ弁置換 (MVR) は,慢性的なミトラ弁吐患者における休息時の排泄分数を減少させます.
- ミトラルバルブ修復 (MVP) は,休息時のエジェクション分数を減少させない.
- 運動中の動的左心房機能に対するMVPの影響は不明である.
研究 の 目的:
- 標準MVRとMVPを直接比較する.
- 自転車でのエクササイズ中の心房エジェクション性能に対するMVR対MVPの影響を決定する.
主な方法:
- 10人のMVPを受けた患者と10人のマッチングした患者が,慢性的なミトラル反発のためにMVRを受けた.
- 症状に制限され,グレードアップされた直立自転車運動.
- 同時ドップラーと定量的二次元エコーカルディオグラフィー.
主要な成果:
- MVPの患者は,MVRの患者よりも,休息と運動のエジェクション分子が著しく高かった.
- エンドシストリック周周壁ストレスは,MVP患者の休息状態とピーク運動において有意に低かった.
- 左心室の形状は,運動のピーク時にMVR患者で球状だった.
結論:
- 弦切断によるMVRは,末縮壁のストレス増加により,休息と運動のエジェクション分数を大幅に減少させます.
- MVPは,エンド・シストリック・ストレスを減らし,円形の室の幾何学を維持することにより,休息と運動の放出指数を改善します.
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