左心室改造によるバイオエネルギー的な影響
1Department of Medicine, University of Minnesota Medical School, Minneapolis 55455, USA.
Circulation
|August 15, 1995
まとめ
変異した心筋高エネルギーリン酸のレベルは,左心室 (LV) の改造と相関しています. 改造された心臓では,ペースは下腸内臓のリン酸塩レベルを悪化させ,機能障害と血流の再分配に関連しています.
科学分野:
- 心臓病学 心臓病学
- バイオケミストリー バイオケミストリー
- メディカルイマージング (医学イメージング)
背景:
- 左心室 (LV) の改造は,機能不全と冠動脈の流れの減少と関連しています.
- これらの変化の背後にあるメカニズム,特に心筋高エネルギーリン酸を含むメカニズムは不明のままです.
研究 の 目的:
- 心筋の高エネルギーリン酸濃度と左心室リモデリングの関係について調べる.
- 改造された心臓におけるこれらのリン酸塩レベルに対するペースの影響を調査するために.
主な方法:
- 磁気共鳴画像 (MRI) は,誘導されたLVリモデリングを受けた犬のLV質量と体積を評価しました.
- 31P磁気共鳴光譜法 (MRS) で,トランムラル高エネルギーリン酸塩のレベルを測定しました.
- 血液の流れは,基礎状態とペースでマイクロスフィアを使用して測定されました.
主要な成果:
- 改造されたLVは,体重と体積が増加し,心下クレアチンフォスファート (CP) /ATP比が低下した.
- 下腸内皮のCP/ATP比は,LVの改造の程度と逆に相関していた.
- 改造された心臓におけるペースは,心下血流とCP/ATPのレベルを低下させ,終末腹圧を上昇させた.
結論:
- 心筋高エネルギーリン酸の変化は,LVリフォームの重症度と相関しています.
- ペーシング誘発性短心症は,再構築された心臓における下腸内臓のリン酸枯渇を悪化させ,機能不全と血流分布の変化と関連しています.
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