ベータ・タラセミア・マジャーの患者における動脈の硬化と内皮機能
Y F Cheung1, Godfrey C F Chan, S Y Ha
1Division of Paediatric Cardiology, Grantham Hospital, The University of Hong Kong, China. xfcheung@hkucc.hku.hk
Circulation
|November 13, 2002
まとめ
ベータ・タラセミア・メジャー症の患者は,左心室縮とともに,動脈の硬化と内皮機能不全の増加を示します. これらの心血管の変化は,心臓の機械的効率を低下させる可能性があります.
科学分野:
- 心血管医学 心血管医学
- 血液学 ヘマトロジ
- 血管生物学 血管生物学
背景:
- 鉄の貯蔵量の増加は,心血管疾患のリスクと関連しています.
- 構造的動脈の変化とインビトロ内皮機能不全は,ベータ・タラセミア・メジャーで観察される.
- これらの患者の体内動脈硬化と内皮機能は,調査を必要とする.
研究 の 目的:
- ベータ・タラセミア・メジャー患者における動脈の硬さと内皮機能の評価.
- ベータ・タラセミアメジャー患者の血管のパラメータを,健康な対照群と比較するために.
- 血管のパラメータと左心室の質量との相関を調査する.
主な方法:
- エコーカルディオグラフィーは,左心室 (LV) の質量と機能を評価した.
- 動脈の硬さは,硬さ指数 (大動脈) とパルス波速度 (PWV) (ブラキオラジアル) で測定される.
- フローメディエイトされた膨張 (FMD) とグリセリル三酸塩反応によって評価された内皮機能.
主要な成果:
- 患者は,対照群と比較して,LV質量,頸動脈硬度指数,およびブラキオラジアルPWVの増加を示した.
- 患者に流れ媒介拡張 (FMD) の障害が観察されたが,グリセリル三酸塩の反応は維持された.
- 動脈の硬さは, FMD と逆相関し, LV 質量と正相関したが,フェリチン濃度とは相関しなかった.
結論:
- ベータ・タラセミア・マジャーは,動脈の硬さが増加し,内皮機能不全と関連しています.
- これらの患者には左心房高縮症が認められます.
- これらの血管と心臓の変異は,心臓の機械的効率を損なう可能性があります.
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