拡散性動脈硬化症の患者に異常な表心冠動脈抵抗があるが",正常"な冠動脈血管撮影がある
B De Bruyne1, F Hersbach, N H Pijls
1Cardiovascular Center Aalst, Aalst, Belgium. bernard.de.bruyne@olvz-aalst.be
Circulation
|November 14, 2001
まとめ
拡散冠動脈動脈硬化症は,目に見える阻害がない場合でも,冠動脈の血流と圧力を低下させます. この発見は,心筋梗塞不全症の理解と治療決定に影響を及ぼします.
科学分野:
- 心血管医学 心血管医学
- 介入性心臓病学 介入性心臓病学
- 生理学 生理学とは
背景:
- アンジオグラフィーは,冠動脈疾患の一般的なプロセスである拡散冠動脈動脈硬化症をしばしば見逃します.
- 非阻害性冠動脈は,通常,正常な流れダイナミクスを持っていると考えられます.
- 動脈硬化症は,焦点性狭窄症だけでなく,動脈の全長に影響を与える拡散性疾患です.
研究 の 目的:
- 冠動脈疾患の患者における非静脈性冠動脈の圧力と流れが低下しているかどうかを調べる.
- 拡散性動脈硬化症による非阻害性冠動脈セグメント全体の圧力低下を定量化するために.
- 拡散性動脈硬化が冠動脈伝導率と小分流量準備 (FFR) に与える影響を決定する.
主な方法:
- 冠動脈圧の測定と非静脈動脈における小分流量準備 (FFR) の測定.
- 健康な個人 (Iグループ) と冠動脈疾患の患者 (IIグループ) の比較.
- 静止状態および高血圧状態における圧差の分析により,冠動脈抵抗を評価する.
主要な成果:
- 冠動脈疾患の患者の非静脈動脈は,健康な対照群と比較して,著しく高い圧力梯度を示した.
- 断片流量準備 (FFR) は,冠動脈疾患の患者の非静脈動脈において有意に低下し,抵抗性の増加を示した.
- 非静脈動脈の大部分は,正常よりも低いFFR値を示し,一部は誘導性不血症の値に達しました.
結論:
- 焦点狭窄のない拡散冠動脈動脈硬化症は,冠動脈の長さに沿って継続的な圧力低下を引き起こします.
- この継続的な圧力低下は,心筋不全症に寄与する.
- 非ステノ性セグメントにおける拡散性動脈硬化症の存在は,介入性心臓病の意思決定に影響を及ぼします.
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