バルブ手術による左心房の収縮機能への影響 長期にわたるミトラル吐症の患者における
1Department of Internal Medicine, University of Michigan, Ann Arbor, USA.
Circulation
|August 15, 1995
まとめ
ミトラ弁の手術は,長期にわたるミトラ弁の吐を患っている患者の左心房の収縮機能を著しく改善します. この介入は,特に手術前にエジェクション分子が保存されている患者に推奨されます.
科学分野:
- 心臓病学 心臓病学
- 心血管外科手術についてです.
- 心臓生理学 心臓生理学
背景:
- 長期間のミトラル反発は,左心房の収縮機能の障害につながる可能性があります.
- 手術後のこの障害の可逆性は,重要な臨床問題である.
研究 の 目的:
- 長期にわたるミトラル逆流症の患者で,成功した弁手術の後,左心房の収縮機能が改善するという仮説を検証する.
- 手術後の左心室動脈結合と左心室ポンプ効率の変化を評価する.
主な方法:
- バルブ手術の成功前と1年後,長期にわたるミトラル吐症の患者15人を研究した.
- マイクロマノメーターで取得した左心室圧力と放射性核素血管図.
- 左心室動脈結合 (Ees, Ea) と左心室ポンプ効率の評価.
主要な成果:
- 成功したミトラバルブ手術の結果,リグルジタント指数が低下し,左心室の体積が減少しました.
- 左心室収縮指数 (Ees) は手術後 (0.95〜2.62 mm Hg/mL,P < .01) で有意に増加しました.
- 左心室ポンプ効率が著しく改善された (0.23〜0.55,P < .0001),心室動脈結合が改善された.
結論:
- 長期間のミトラル吐に関連した左心房の収縮性障害は,手術後にしばしば回復します.
- 中心弁の手術は,左心室の収縮性を維持するために推奨されますが,特に排泄分子が保存され,術前障害が少ない患者では特に推奨されます.
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