STセグメントの上昇の不完全な解消は,急性心筋梗塞のステントを施した後,一時的な小循環機能障害のマーカーです
Laurent J Feldman1, Pierre Coste, Alain Furber
1CHU Bichat-Département de Cardiologie, 46, rue Henri Huchard, 75018 Paris, France. laurent.feldman@bch.ap-hop-paris.fr
Circulation
|May 14, 2003
まとめ
急性心筋梗塞 (AMI) 血管新生手術後の不完全なSTセグメント解像度 (STR) は,重度の小循環機能障害を示しています. この機能障害は,ステントが成功した後でも,より広範な心筋損傷に関連しています.
科学分野:
- 心臓病学 心臓病学
- 介入性心臓病学 介入性心臓病学
- 微循環の研究 マイクロ循環の研究
背景:
- 急性心筋梗塞 (AMI) の初次血管新生手術後の不完全なSTセグメント解像度 (STR) は,患者の悪いアウトカムと相関しています.
- マイクロ循環器の機能障害は,悪いSTRに潜在的に寄与しますが,その重度と持続性はさらなる調査を必要とします.
研究 の 目的:
- 主要血管新生手術後の不完全なSTRが重度の小循環器機能不全を意味するかどうかを判断する.
- 冠動脈流動速度準備 (CVR) と心筋損傷に対するSTRの影響を評価する.
主な方法:
- 冠内ドップラー速度測定は,一次血管新生手術とステントを施した50人のAMI患者に用いられました.
- 測定には,STセグメントの解像度,早期のシストリック逆行フロー,およびステント前およびステント後の冠動脈フロー速度リザーブ (CVR) が含まれていました.
主要な成果:
- <50%のSTRを有する患者は,より高い逆行フローとより低いCVRを含む重度の小循環機能障害の兆候を示した.
- ステントを挿入した後のCVRは,STR>=50%の患者で改善されたが,STR<50%の患者では改善されなかった.
- 不完全なSTRは,左心室のエジェクション分子が減少し,3ヶ月で心臓発作の大きさが増加した.
結論:
- ステントを挿入したプライマリ血管新生手術の成功後の不完全なSTR (<50%) は,AMI患者において,潜在的に一時的なマイクロ循環機能障害のマーカーとして機能する.
- この機能障害は,より重大な心筋損傷と関連しています.
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