急速な塩水負荷に対する血液動力学的反応:年齢,性別,心不全の影響
Naoki Fujimoto1, Barry A Borlaug, Gregory D Lewis
1University of Texas Southwestern Medical Center at Dallas.
Circulation
|November 23, 2012
まとめ
健康なボランティアは,体積負荷で圧力を満たすのに有意な増加を示しています. 高齢の女性や心不全でエジェクション分子が保存されている患者は,肺毛細血管の圧と肺動脈の平均血圧の最大の上昇を示しています.
科学分野:
- 心臓病学 心臓病学
- 心血管生理学 心血管の生理学
背景:
- ヘモダイナミック評価ポスト・ボリューム・チャレンジは,保存されたエジェクション分数 (HFpEF) による心不全を特定するための提案された方法です.
- 年齢と性別を考慮して,体積の課題に対する規範的血液動力学的反応は十分に確立されていません.
研究 の 目的:
- 健康な個体における体積負荷に対する年齢および性に関する規範的血液動力学的反応を確立する.
- 健康な対照群とHFpEF患者における体積負荷に対する血液動力学的反応を比較する.
主な方法:
- 60人の健康な被験者に右心経キャセテリゼーションを行い,肺毛細血管圧 (PCWP) と肺動脈平均圧 (mPAP) を測定した.
- 被験者は,体積増量のために,急速な塩水注入 (100-200mL/分) を受けました.
- 11人のHFpEF患者の血液動力学的反応は,健康な若年 (<50歳) と高齢者 (≥50歳) と比較された.
主要な成果:
- 健康な被験者では,PCWPは1Lの~1L後に10±2から16±3mmHg,塩水2Lの~2L後に20±3mmHgに増加した.
- 高齢の女性は,他のグループ (P≤0.019) よりもPCWPの急上昇 (16±4 mm Hg·L−1·m2) を示した.
- 女性では,男性よりも心臓の出力に対してmPAPの増加が大きく,HFpEFの患者は,健康な対照群 (P≤0.005) よりもPCWPの急上昇 (25±12 mm Hg·L−1·m2) を示した.
結論:
- 増加した充填圧は,体積負荷を伴う健康な個体でも観察されています.
- 高齢の女性とHFpEF患者では,PCWPとmPAPの増加が最も顕著で,体積が増加している.
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