犯人血管冠動脈の介入中に発見された偶発的,無症状の病変の臨床進行
Ruchira Glaser1, Faith Selzer, David P Faxon
1University of Pennsylvania, Philadelphia, PA 19104, USA.
Circulation
|December 30, 2004
まとめ
経皮冠動脈干渉 (PCI) を受けている患者の約6%が,1年以内に非標的の病変でプラークの進行を経験します. 多血管冠動脈疾患は,これらの病変のためにさらなるPCIが必要になるリスクを高めます.
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
- 血管生物学 血管生物学
背景:
- 薬剤排出ステントの登場により,レステノシス率が低下し,皮膚経冠動脈介入 (PCI) 中の偶発的な非標的病変の管理に重点を移した.
- 伝統的にレステノスのリスクのために保守的に管理されていたこれらの病変は,プラークの不安定性を防ぐためにPCIを考慮されています.
- 未治療の偶発的な狭窄症が将来の心臓病に与える臨床的影響は,まだ十分に理解されていません.
研究 の 目的:
- ノンターゲット病変における臨床プラーク進行の発生率と特徴を決定する.
- これらの病変でPCIを繰り返す必要性に関連した危険因子を特定する.
- 進行する非標的病変の患者の臨床的アウトカムを評価する.
主な方法:
- 国立心臓,肺,血液研究所ダイナミック・レジストリを利用した回顧的なコホート研究.
- 1997年から1999年の間にPCIを受けた連続した患者の分析.
- クリニカルプラークの進行と1年間のフォローアップで非標的病変PCIの必要性の評価.
主要な成果:
- 3747人のPCI患者の5.8%は,1年以内に臨床的なプラーク進行のために追加の非標的病変PCIを必要とした.
- このうち,59%が新たな不安定性アンギナ,9.3%が非致命的な心筋梗塞を発症した.
- 多血管冠動脈疾患の患者は,非標的の病変のPCI (OR 1.72 for 2 vessels, OR 3.37 for 3 vessels) を必要とする可能性が著しく高かった.
- 後のPCIを必要とする病変は,最初はしばしば<または=60%の狭窄 (86.9%) であり,平均41.8%から83.9%の狭窄に進行した.
結論:
- PCIを受けた患者の約6%が1年以内に非標的の病変で臨床的なプラーク進行を経験し,さらなる介入が必要になります.
- 冠動脈疾患のより高い負荷は,これらの病変における臨床的なプラーク進行の有意な予測因子です.
- これらの発見は,将来の不良心疾患を予防するために,特定の非標的病変に対する介入を検討する重要性を強調しています.
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