正常な冠動脈と,冠動脈の流れの準備が低下した患者の運動中に異常な冠動脈動脈運動
A S Bortone1, O M Hess, F R Eberli
1Medical Policlinic, Division of Cardiology, University Hospital, Zürich, Switzerland.
Circulation
|March 1, 1989
まとめ
胸痛と正常な動脈を持つ患者は,異常な冠動脈血管活性を持つ可能性があります. 運動中に遠部静脈収縮を発症する人もいますが,これは異常な冠動脈血管拡張症候群を示し,潜在的に神経経因子に関連しています.
科学分野:
- 心臓病学 心臓病学
- 血管生理学 血管生理学
背景:
- 冠動脈の正常な動脈にもかかわらず,イシュケミアのような症状を呈する患者では,冠動脈の流れの準備が減少することが観察されています.
- これらの患者の異常な冠動脈血管運動の根本的なメカニズムを理解することは,診断と治療に不可欠です.
研究 の 目的:
- イシュケミアのような症状と正常な冠動脈を有する患者の冠動脈動脈とフロー・リザーブを調査する.
- 生理学的および薬理学的刺激に対する冠動脈血管反応の明確なパターンを識別する.
主な方法:
- 定量冠動脈動脈撮影は,運動とニトログリセリンへの反応として,ルミネール領域の変化を評価するために使用されました.
- 冠動脈鼻腔の血流は,ディピリダモール注入後の熱希釈を用いて測定した.
- 患者は,運動中の冠動脈の反応 (血管拡張対血管収縮) に基づいてグループに分けられました.
主要な成果:
- 7人の患者 (1群) は,運動中におよびニトログリセリン投与後,近辺および遠端の両方の冠動脈の血管拡張を示した.
- 6人の患者 (2群) は,運動中に遠隔冠動脈静脈収縮を示し,近接血管拡張があり,ディピリダモール投与後にフロー・リザーブが減少した.
- グループ1は冠動脈流量比が2.5で,グループ2は1.2 (p<0.05) でした.
結論:
- 正常な冠動脈と不血症の症状を有する患者のサブセットは,異常な拡張器反応,特に運動中の遠隔血管収縮を示す.
- このグループ (異常な冠動脈血管拡張症候群) は,dipyridamole後の抵抗容量の低下を示しています.
- この発見は,運動誘発の遠隔冠動脈静脈収縮と鈍化した血管応答における異常なニューロ・ユーモラル・トーンの潜在的な役割を示唆している.
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