フォスフォディエステラーゼ5型阻害が,重度の症状のある大動脈狭窄症の患者における全身的および肺の血液動力学および心室機能に及ぼす影響
Brian R Lindman1, Alan Zajarias, José A Madrazo
1Cardiovascular Division, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA. blindman@dom.wustl.edu
Circulation
|March 27, 2012
まとめ
シルデナフィルのリン酸エステラゼ5型阻害は,重度の大動脈狭窄患者の血液動力学を安全に改善し,肺および全身の抵抗を軽減します. これは,大動脈狭窄の補助療法としてその使用に関するさらなる研究をサポートしています.
科学分野:
- 心臓病学 心臓病学
- 薬理学 薬理学とは
背景:
- 大動脈狭窄は不適応的な改造を引き起こし,肺高血圧と心不全につながる.
- 臨床前研究では,フォスフォディエステラゼ5型 (PDE5) 阻害剤は圧力過負荷に有益であると示唆されていますが,低血圧の懸念により,大動脈狭窄の臨床使用は議論されています.
研究 の 目的:
- 重度の症状のある大動脈狭窄症の患者における シルデナフィルの単一口投与の安全性と血液動力学的効果を評価する.
主な方法:
- 症状のある重度の大動脈狭窄症の20人の患者は,単発の口服用シルデナフィル (40mgまたは80mg) を投与されました.
- 血管抵抗,圧力,コンプライアンス,および脳卒中量指数を含む血液動力学的パラメータは,薬剤投与前および後に測定されました.
主要な成果:
- シルデナフィルは,全身的および肺血管抵抗および肺動脈および圧の平均を大幅に低下させた.
- 血管コンプライアンスと脳卒中量指数は,シルデナフィルの投与後,有意に増加しました.
- 血液動力学的変化は用量依存的ではなく,薬剤は好調に耐えており,症状的低血圧はありませんでした.
結論:
- PDE5阻害剤 (シルデナフィル) の単一投与は,重度の大動脈狭窄患者では安全であり,よく耐受されます.
- シルデナフィルは,肺および全身の血液動力学を改善し,双心室の放出につながった.
- 発見は,大動脈狭窄の補助療法としてPDE5抑制に関するさらなる長期的な研究を支持する.
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