冠動脈血圧高血圧は,冠動脈内ナトリウムニトロプルシドの投与量に対する反応を示しています
Walter A Parham1, Andre Bouhasin, Jeffrey P Ciaramita
1J. Gerard Mudd Cardiac Catheterization Laboratory, St Louis University Health Sciences Center, St Louis, Mo, USA.
Circulation
|March 3, 2004
まとめ
ナトリウムニトロプロシドは,アデノシンと比較して,心臓キャセテリゼーション中に同等だがより長期にわたる冠動脈高血症をもたらす. この薬剤は,有害な全身的効果なしに冠動脈の血流を効果的に刺激し,生理学的測定に適しています.
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
- 薬理学 薬理学とは
背景:
- ナトリウムニトロプロシドは,急性冠動脈介入におけるノーリフロー現象の潜在的な治療法です.
- 冠動脈内ニトロプルシドの用量反応と血液動力学的効果に関するヒトのデータは限られている.
- この研究では,心臓キャセテリゼーションを受けている患者の冠内ニトロプロシドとアデノシンを比較しています.
研究 の 目的:
- 冠動脈高血圧と冠動脈内ニトロプルシドに対する全身的血動力学的反応と冠動脈内アデノシンを比較する.
- 正常な冠動脈を持つ患者におけるニトロプロシドの有効性と安全性を評価する.
- 断片フローリザーブ (FFR) 測定のためのハイペレミア刺激剤としてのニトロプロシドの有用性を評価する.
主な方法:
- 冠動脈の血流速度,心拍数,血圧は,正常な動脈を持つ21人の患者で測定されました.
- 冠内ニトロプロシド (0.3-0.9μg/kg) とアデノシン (30-50μg) の連続投与を行った.
- 断片フロー・リザーブ (FFR) は,両剤を使用した中間の狭窄症の9人の患者で測定されました.
主要な成果:
- 冠内ニトロプロシドは,アデノシンに相当する冠動脈高血症を誘発し,持続時間が25%長かった.
- 高用量ニトロプルシド (0.9μg/kg) は,心拍数変化が最小限に伴い,静脈血圧が20%以下低下した.
- アデノシンは,全身的血液動力学に有意な影響はなかった.
- FFRの測定値は,ニトロプロシドとアデノシン (r=0.97) の間で同一でした.
結論:
- 冠動脈内ニトロプルシドは,正常な冠動脈においてアデノシンよりも,同等の,しかし,より持続的な高血圧反応を提供します.
- ニトロプルーシドは,ノーリフロー治療に使用される用量では,有害な全身的効果なしに持続的な高血症を達成します.
- ニトロプロシドは,FFRを含む冠動脈の生理学的測定のための有効な高血圧刺激剤です.
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