閉塞性心不全の患者におけるシヌスノード機能の再構築:シヌスノードリザーブの減少
Prashanthan Sanders1, Peter M Kistler, Joseph B Morton
1Department of Cardiology, Royal Melbourne Hospital, and University of Melbourne, Melbourne, Australia.
Circulation
|August 11, 2004
まとめ
閉塞性心不全 (CHF) の患者は,心臓のリズムに影響を与える,重要なシヌス節の再編成を示します. シヌスノードとクリスタ・ターミナリスに影響するこの機能障害は,CHFにおけるブラジカルディアを説明する可能性がある.
科学分野:
- 心臓病学 心臓病学
- 電気生理学 電気生理学
- 心不全に関する研究
背景:
- 前頭房の改造は,閉塞性心不全 (CHF) で一般的です.
- シナスノード機能障害は,CHFの患者で仮定されています.
研究 の 目的:
- 症状のあるCHFの患者のシヌスノード機能を調査する.
- シヌスノード複合体と周囲の心房組織における解剖学的および電気生理学的変化を評価する.
主な方法:
- 自律的封鎖下で18人のCHF患者と18人の対照群を研究した.
- 評価された内在シヌスサイクルの長さ,修正されたシヌスノード回復時間 (CSNRT),シノアトリアル伝導時間.
- シヌスノード複合体,シノアトリアル伝播,クリスト・ターミナリスの特徴を分析するために,電気解剖学的マッピングを使用した.
主要な成果:
- CHFの患者は,長時間の内在性シナプスサイクルの長さとCSNRTを示した.
- 異常は,尾関節の活動局所化と長時間シノアトリアル伝導時間であった.
- 断片化された電図,二重ポテンシャル,および電圧の振幅の減少は,CHF患者のクリストターミナリスに沿って観察されました.
結論:
- CHFの患者は,構造的な変化で重要なシヌスノードリモデリングを示します.
- CHFでは,機能性シヌスノードリザーブが減少していることが確認されました.
- 発見は,ブラジカルディア,クロノトロプ剤の使用,およびCHFのペースに関する影響を示唆しています.
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