不安定性アンギナと冠動脈血管新生術
R K Myler1, R E Shaw, S H Stertzer
1San Francisco Heart Institute, Seton Medical Center, Daly City, Calif 94015.
Circulation
|September 1, 1990
まとめ
安定したアンギナ患者と比較して,不安定なアンギナ患者は,冠動脈血管新生手術後により重度の病変とより高い合併症率を示しました. 不安定性アンギナにおける早期血管形成は,成功率の低下と有害事象の増加と関連していました.
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
背景:
- 冠動脈血管形成術は,胸痛に対する重要な介入です.
- 安定した胸痛 (SAP) と不安定な胸痛 (UAP) の間のアウトカムを区別することは,治療の最適化にとって極めて重要です.
研究 の 目的:
- SAPとUAP患者の臨床的要因,血管新生手術の結果,および長期的なアウトカムを比較するために.
- UAP患者における血管新生手術の結果に対する症状の持続時間の影響を調査する.
主な方法:
- 選択性冠動脈血管新生手術 (1982年-1985年) を受けた2,122人の患者の遡及的分析.
- SAPとUAPのグループ間のベースラインの特徴,手順の成功率,合併症率,およびフォローアップデータ (平均37ヶ月) の比較.
- アンジオプラスティのタイミングとアンギナ発症の相対的なタイミングに基づくUAP患者のサブグループ分析.
主要な成果:
- UAP患者 (38%) は,SAP患者 (62%) よりも,より重篤で複雑な病変と冠内血栓の発症率が高かった.
- 血管新生手術の成功率はUAPでは84%,SAPでは88% (p<0.05),合併症はUAPでは6.7%,SAPでは4.7% (p<0.05) でした.
- 遅期のアンギナ再発 (30.1%対25.2%) と労働復帰率の低下 (86%対91%) がUAP患者で観察されました. UAPでの早期血管新生手術 (<1週間) は,後の血管新生手術 (≥2週間) (86.3%の成功率,4.8%のイベント率) と比較して,成功率が低い (79.1%) であり,主要な心疾患の発生率が高い (11.5%) であった.
結論:
- UAPの患者は,異なる病変形態を示し,SAPの患者と比較して,より高い合併症率とより悪い長期的なアウトカムを経験します.
- 血管新生手術を1週間以上延期すると,処置の成功が向上する可能性があるが,有害事象の増加の可能性のために,注意深くリスク・利益の評価を必要とするため,UAPの適切な介入は極めて重要です.
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