付随経路を有する患者のイブチリドの電気生理学的効果
K A Glatter1, P C Dorostkar, Y Yang
1Cardiovascular Research Institute and Section of Adult and Pediatric Cardiac Electrophysiology, University of California, San Francisco, USA.
Circulation
|October 17, 2001
まとめ
イブチリドは,ウルフ・パーキンソン・ホワイト症候群患者の心房細動 (AF) を効果的に終結させ,心房節および付属経路 (AP) の屈折性を延長します. この研究では,AP媒介性AFに対するイブチリドの使用の最初の小児症例が含まれています.
科学分野:
- 電気生理学 電気生理学
- 薬理学 薬理学とは
- 心臓病学 心臓病学
背景:
- 心房細動 (AF) は,ウォルフ・パーキンソン・ホワイト症候群の患者において,生命を脅かす心房不律のリスクを伴う.
- アクセサリー経路 (AP) は,これらの心律乱症の病理生理学に関与しています.
研究 の 目的:
- 付随経路 (AP) の患者における心臓伝導システムに対するイブチリドの効果を将来的に評価する.
- AP媒介性心房動 (AF) の終結におけるイブチリドの有効性を評価する.
主な方法:
- 第1部:イブチリドは,小児患者を含む,電気生理学研究中にAFを有する22人の患者に投与されました.
- 第II部:イブチリドを18人の患者に投与し,APと伝導システムへの影響を評価した.
- 測定対象は,心房中枢節,AP,ヒス・パーキンジェ系の耐火期およびブロックサイクルの長さであった.
主要な成果:
- イブチリドは,患者の95%でAFを終了させ,最短のプリエクシテッドR-R間隔を延長しました.
- イブチリドは,前段階の心房節の有効耐火期 (ERP) と前段階のAP ERPを著しく延長しました.
- ヒス・プルキンジェ系の反射性は,61%の患者で増加し,副作用は報告されていません.
結論:
- イブチリドは,小児集団を含むAP媒介性AFを終了するのに有効です.
- イブチリドは,心房中枢節,ヒス・パーキンジェ系,および付属経路の屈折性を延長します.
- これは,ウォルフ・パーキンソン・ホワイト症候群に関連する心律乱症の管理におけるイブチリドの潜在的な治療的役割を示しています.
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