重症大動脈弁狭窄症に対する大動脈弁置換術後のストーンハート症候群:症例報告
1Department of Cardiovascular and Thoracic Surgery Anaesthesiology, Nicosia General Hospital, Nicosia, CYP.
Cureus
|February 23, 2026
まとめ
ストーンハート症候群(SHS)は、心臓手術におけるまれで致命的な合併症です。この症例は、不可逆的な心筋収縮を防ぐために虚血時間を最小限に抑えることの重要性を強調しています。
科学分野:
- 心臓病学;心臓手術
背景:
- ストーンハート症候群(SHS)は、心臓手術におけるまれで壊滅的な合併症である。;長時間の全身性心筋虚血後の不可逆的な虚血性心筋収縮を特徴とする。;SHSは、確立されるとほぼ一様に致命的である。
研究 の 目的:
- 大動脈弁置換術を受けた患者におけるストーンハート症候群(SHS)の症例を報告する。;心筋虚血時間の最小化の重要な役割を強調する。
主な方法:
- 重症の症候性大動脈弁狭窄症の55歳女性が、選択的な機械的弁大動脈弁置換術を受けた。;ミニ胸骨切開中の技術的な困難により、大動脈クランプ時間が延長し、心筋保護液の投与が繰り返された。;術後に中心静脈-動脈体外式膜型人工肺を開始した。
主要な成果:
- 患者は完全な左心室無運動症を発症し、人工心肺からの離脱が不可能となった。;完全胸骨切開により、SHSと一致する硬く、コンプライアンスのない心筋が明らかになった。;体外式膜型人工肺にもかかわらず、心筋の回復は起こらず、患者は多臓器不全により死亡した。
結論:
- SHSは、ATP枯渇、カルシウム過負荷、および不可逆的なアクチン-ミオシン結合につながる、重度の心筋虚血の結果である。;注意深い心筋保護と虚血時間の最小化による予防が、唯一の効果的な戦略である。;この症例は、SHSの壊滅的かつ不可逆的な性質を強調する。
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