前回の冠動脈バイパス手術と,左心室機能不全の患者における死亡リスク
G D Veenhuyzen1, S N Singh, D McAreavey
1Cardiovascular Research Group, University of Calgary, Calgary, Alberta, Canada.
Circulation
|September 26, 2001
まとめ
冠動脈バイパス移植 (CABG) は,左心室 (LV) 機能不全の患者における死亡率を大幅に低下させる. この発見は,これらの患者を対象とした以前の研究で,なぜ除細動器療法が効果を示さなかったかを説明するのに役立ちます.
科学分野:
- 心臓病学 心臓病学
- 心臓外科手術について
背景:
- 左心室 (LV) 機能不全の患者には,突然の心臓死のリスクが高くなります.
- CABGパッチ試験は,冠動脈バイパス移植 (CABG) を受けているLV機能不全患者の予防性除細動器療法による生存上の利益を示さなかった.
研究 の 目的:
- 発血性LV機能不全患者の死亡率と突然死リスクに対する以前のCABGの影響を評価する.
- CABGが進行性心不全による死亡リスクに影響するかどうかを判断する.
主な方法:
- 左心室機能不全研究 (SOLVD) 試験の5410人の患者を分析した.
- 以前のCABGの履歴のある患者とそれのない患者のアウトカムを比較し,ベースラインエジェクション分数 (EF) によって層分化しました.
主要な成果:
- 前回のCABGは,EFと心不全の重度に関係なく,全死亡率の25%の減少と突然死のリスクの46%の減少と関連していました.
- 予行CABGによる突然死リスクの低下の利点は,基値EFの低下に伴い増加した.
- 前回のCABGで進行性心不全による死亡リスクの有意な変化は観察されなかった.
結論:
- 前回のCABGは,不全性LV機能不全の患者の死亡率を大きく独立して減少させています.
- これらの発見は,CABGパッチ試験でデフィブリレーター療法で観察された利益の欠如の潜在的な説明を提供します.
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