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小児拡張型心筋症における基部優位の右室機能不全:二心室ひずみ統合解析
Iolanda Muntean1,2, Diana Ramona Iurian2,3, Asmaa-Carla Hagau3,4
1Department of Pediatrics III, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mureș, 540136 Targu Mures, Romania.
Biomedicines
|January 28, 2026
まとめ
小児拡張型心筋症(DCM)は右室(RV)に関与し、RVひずみは特に基部で低下する。二心室ひずみ解析は、高度な機能制限を持つ小児の特定に役立つ。
科学分野:
- 小児心臓病学
- 心血管イメージング
- 生体医工学
背景:
- 小児拡張型心筋症(DCM)における右室(RV)の関与がますます認識されている。
- 小児DCMにおけるRVの変形特性とその機能状態との関連をさらに定義する必要がある。
研究 の 目的:
- 2D Speckle Tracking法(2D-STE)を用いて小児DCMにおけるRV変形パターンを調査すること。
- RVひずみ指標と小児DCMにおける機能的制限との関連を評価すること。
- 機能層別化における二心室ひずみ解析の有用性を評価すること。
主な方法:
- 従来の心エコーおよび2D-STEを用いて、DCM患児29例と年齢・性別を一致させた対照群を比較した。
- 線形混合効果モデルを用いて、RVおよび左室(LV)の各部位のひずみを解析した。
- ロジスティック回帰およびROC解析を用いて、ひずみと高度な機能分類(NYHA/Ross III-IV)との関連を評価した。
主要な成果:
- DCM患児は対照群と比較して二心室機能障害およびRVひずみの低下を示した(p < 0.05)。
- RVひずみの低下は主に基部優位であった。
- RV自由壁縦ひずみ(RVFWSL)および左室全体縦ひずみ(LVGLS)は、従来のパラメータと相関し、高度な機能分類を予測した。
結論:
- 小児DCMは、基部優位の変形パターンを伴うRVの関与を特徴とする。
- 特にRVFWSLとLVGLSを組み合わせた二心室ひずみ評価は、高度なDCMを持つ小児の特定と機能層別化を向上させる。
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