冠動脈の流れ速度は,面面積と左心室の地域的な質量に関連しています
H V Anderson1, M J Stokes, M Leon
1University of Texas Health Science Center and Hermann Hospital, Houston 77225, USA. skipand@heart.med.uth.tmc.edu
Circulation
|July 6, 2000
まとめ
静止冠動脈の流れ速度は,心臓の大きさと関連しています.
科学分野:
- 心血管生理学 心血管の生理学
- 冠動脈疾患 冠動脈疾患 冠動脈疾患
- ヘモダイナミクスは,
背景:
- 冠動脈の流れ速度は,静止状態で個体間の有意な変動を示している.
- 冠動脈流量準備量 (ハイペレミアと静止速度の比) は,一般的に研究されている指標です.
- 流れの連続性原理は,静止冠動脈の流れをモデル化するために調査されました.
研究 の 目的:
- 流れの連続性原理が静止冠動脈の流れをモデル化できるという仮説を検証する.
- 冠動脈のルメンサイズと静止速度との関係を調べる.
- 冠動脈動脈硬化が静止状態の流れダイナミクスに与える影響を調査する.
主な方法:
- 59人の患者の静止速度と高血圧速度を測定するために使用されたドップラー線.
- ルーメン横断面積と遠冠動脈枝長さの定量的な計算.
- 地域左心室質量とルメン面積と質量比 (A/m) の推定.
主要な成果:
- 静止速度 (V) は,A/m比 (V=46.5/(A/m)) と逆関係を示した.
- A/m比は,左前下動脈疾患の重度が増加するにつれて減少した.
- 休息時の平均ピーク速度は,より重度の冠動脈動脈硬化症で増加する傾向がありました.
結論:
- 静止冠動脈の流れ速度は,ルーメン面積と地域左心室質量比に逆関係しています.
- 休息速度の上昇は,拡散性冠動脈動脈硬化症の典型である心筋膜床の不十分なルメンサイズを示しています.
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