バルーンで拡張可能なトランスキャセター大動脈弁の置換中に大動脈の根の破裂に関連した解剖学的および手続的特徴
Marco Barbanti1, Tae-Hyun Yang, Josep Rodès Cabau
1St Paul’s Hospital, Vancouver, BC, Canada.
Circulation
|June 11, 2013
まとめ
トランスキャセター大動脈弁置換 (TAVR) 中の大動脈根の破裂は,左心室外流管 (LVOT) の化と弁の過大化に関連しています. これらの予測要因を特定することは,TAVR手順における破裂リスクを軽減するのに役立ちます.
科学分野:
- 心血管画像検査 (CVDI) について
- 介入性心臓病学 介入性心臓病学
- バイオメディカルエンジニアリング
背景:
- 大動脈の根の破裂は,気球拡張型トランスキャセター大動脈弁置換 (TAVR) の深刻な合併症です.
- この破裂を予測して予防することは,TAVRの手続き中の患者の安全にとって極めて重要です.
研究 の 目的:
- バルーンで拡張可能なTAVRを施した患者における大動脈根の破裂の予測要因を特定する.
- リスク評価のために多検出器コンピューティングトモグラフィー (MDCT) を利用する.
主な方法:
- TAVR中に大動脈の根が破裂した31人の患者を,破裂のない31人のマッチングコントロールと比較したケース・コントロール研究.
- MDCTの分析には,シノチューブル結節,アヌルス,およびLVOTの測定,およびカルシフィケーションの評価が含まれていました.
- 術前臨床およびエコーカルディオグラフィのデータを収集し,グループ間で比較した.
主要な成果:
- 大動脈の根の破裂を患った患者は,対照群と比較して,LVOT/サブナヌルカルシフィケーション (アガストンのスコア) が著しく高かった.
- 断裂グループでは,義肢の大きすぎ (環状領域の≥20%) の頻度が高いことが観察されました.
- 中等/重度のLVOT/亜状結石化および義肢の大きすぎた≥20%は,主動脈の根の破裂と独立して関連していました.
結論:
- LVOTのカルシフィケーションとアグレッシブな環状領域のオーバーサイジングは,気球拡張バルブによるTAVR中に大動脈根の破裂の重要な危険因子です.
- これらの発見を検証し,リスクの階層化を洗練するために,より大きなコホートでのさらなる研究が推奨されます.
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