高リスクの左心房高縮症の患者における心筋硬化増加: 発射分子が保存されたB段階の心不全の特徴
Michinari Hieda1,2, Satyam Sarma1,2, Christopher M Hearon1,2
1Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas (M.H., S.S., C.M.H., K.A.D., J.M., M.S., B.E., D.P., S.L., M.M., E.H., B.D.L.).
Circulation
|December 24, 2019
まとめ
左心室縮 (LVH) と心臓バイオマーカー値上昇の中年個人は,左心室筋硬化が増加しています. この発見は,保存されたエジェクション分数 (HFpEF) による心不全への移行状態を示唆する.
科学分野:
- 心臓病科
- 心血管の生理学
- 生物医学工学
背景:
- 左心室高縮 (LVH) と心臓バイオマーカーが上昇した中年の個人は,保存されたエジェクション分数 (HFpEF) の心不全を発症する高いリスクに直面しています.
- この高リスクの原因となる病理学的メカニズムは不明である.
- この研究では,左心室 (LV) 筋硬化が,この高リスク状態に寄与するかどうかを調査しています.
研究 の 目的:
- LVHと心臓のバイオマーカーが上昇した患者は,健康な対照群と比較して,LV心筋の硬さが増加しているという仮説を検証する.
- 将来のHFpEFの潜在的マーカーとして心筋硬直を特定する.
主な方法:
- LVHと心臓のバイオマーカー値が上昇した46人の患者と61人の健康な対照群を募集した.
- 右心経キャセテリゼーションと3Dエコーカーディオグラフィーを用いて LVの圧力と体積の関係を評価した.
- 身体の下部に負の圧力を加え,塩素を注入した.
主要な成果:
- LVH 患者では,対照群と比較して LV 阻害性が著しく低下しました.
- LVHグループでは,対照群と比較して,LV心筋の硬さがほぼ30%高かった (硬さ定数: 0. 053±0. 027).
- 体重,血圧,肺毛細血管の圧の有意な差異が観察されました.
結論:
- LVHとバイオマーカーの患者の高血圧筋硬化症は,HFpEFへの移行段階を示唆する.
- この硬さの増加はHFpEFの早期マーカーである可能性があります.
- 運動訓練などの介入を模索し,LVの遵守を改善し,HFpEFの発現を潜在的に防ぐためにさらなる研究が必要です.
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