大動脈弁バイパス手術:高リスク大動脈狭窄集団における中期臨床結果
James S Gammie1, Leandra S Krowsoski, James M Brown
1Division of Cardiac Surgery, University of Maryland Medical Center, Baltimore, MD 21201, USA. jgammie@smail.umaryland.edu
Circulation
|September 17, 2008
まとめ
大動脈弁バイパス (AVB) 手術は,高リスク患者の重度の大動脈狭窄の有効な治療法を提供します. この手順は,脳卒中と腎臓機能不全の低い割合で,大動脈狭窄症の症状を効果的に軽減します.
科学分野:
- 心血管外科手術についてです.
- 介入性心臓病学 介入性心臓病学
- 医療機器 医療機器について
背景:
- 大動脈狭窄症 (AS) は,介入を必要とする深刻な状態です.
- 動脈弁バイパス (AVB) 外科手術は,動脈管とも呼ばれ,従来の動脈弁置換の代替案を提供します.
- このアプローチは,特にASの高リスク患者にとって重要である.
研究 の 目的:
- 大動脈弁バイパス (AVB) 手術の有効性と安全性を評価する.
- 高リスクの患者に従来の大動脈弁置換術の代替手段としてAVBを評価する.
- 死亡率,脳卒中,腎機能を含む外科手術後のアウトカムを分析する.
主な方法:
- AVB手術は,2003年から2007年の間に,症状のあるASの高リスク患者31人に実施されました.
- この研究では,以前のバイパス・グラフトやポルセリン・アオルタなどの複雑な疾患を持つ患者を対象とした.
- 重要な指標には,心肺バイパス時間,クロスクランプ時間,手術前死亡率,脳卒中発生率,腎機能,および血液動力学的変化が含まれていました.
主要な成果:
- 患者の平均年齢は81歳で,71%が再手術を受け,16%がポルセラン昇動動脈を患っていた.
- 術後の死亡率は13% (4/31) であったが,最後の16人の患者は死亡しなかった. 1回の脳卒中が手術中に発生しました.
- AVB後,大動脈弁の平均傾きが有意に減少した (43.5 mm Hgから10.4 mm Hg),心臓出力の72%で導管の流れがあった. 腎機能は安定していました.
結論:
- 大動脈弁バイパス手術は,症状のある大動脈狭窄症を患っている高リスク患者のための貴重な治療選択肢です.
- この処置は,心室外流の予測可能な分布を作り出すことで,ASを効果的に緩和します.
- AVB手術は,このコホートで不定期な脳卒中と腎機能障害の発生率を示した.
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