選択的なアルファ1およびアルファ2アドレナージックブロックが冠動脈ステントを設置した後の冠動脈フローリザーブに及ぼす影響
Luisa Gregorini1, Jean Marco, Bruno Farah
1Experimental Surgery and Transplantation Institute, Ospedale Maggiore IRCCS, University of Milano, Italy. Luisa.Gregorini@unimi.it
Circulation
|December 4, 2002
まとめ
アルファ・アドレナジック血管収縮は,ステントを挿入した後の冠動脈流量準備量 (CFR) を制限する. ウラピディルやヨヒンビンでアルファアドレナージック受容体をブロックすると,CFRが改善され,アドレナージック系が示唆される.
科学分野:
- 心血管の生理学 心血管の生理学
- 介入性心臓病学 介入性心臓病学について
- 薬理学 薬理学とは
背景:
- 冠動脈流量リザーブ (CFR) は,冠動脈ステントを設置した後の状態がしばしば不最適である.
- アルファ・アドレナジック冠動脈静脈収縮は,CFRを制限すると仮定されています.
研究 の 目的:
- 冠動脈ステント設置後の冠動脈流量準備量 (CFR) の制限におけるアルファアドレナジック血管収縮の役割を調査する.
- アルファアドレナゲン抗剤がステント後CFRに与える影響を評価する.
主な方法:
- ステントを入れている46人の患者の冠動脈の血流速度と横断面面積を評価した.
- ステントを挿入する前と後のアデノシンによる誘発性高血症.
- アルファ(1) 抗原体ウラピディルまたはアルファ(2) 抗原体ヨヒンビンをアデノシンと併用した.
主要な成果:
- ステントはCFRを変化させなかったが,術後には減少した.
- ヨヒンビンとウラピジルは,ステント設置後のCFRが低下した患者でCFRを改善しました.
- 両方の抗剤は,アデノシンの血管拡張効果を高め,血液の流れ速度を高めました.
結論:
- ウラピディルとヨヒンビンによるアルファアドレナージック阻害は,ステントを挿入した後のCFR障害を弱めた.
- アドレナージック系は,冠動脈循環の膨張能力を大幅に制限する.
- アドレナージック系をターゲットにすると,再循環化後の冠動脈の血流が改善される可能性があります.
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