人間のインスピレーション中の左心室脳卒中容量の減少のメカニズム

M Karam, R A Wise, T K Natarajan

Circulation

|May 1, 1984

まとめ

インスピラトリー値負荷は,健康な被験者のエジェクション分数と脳卒中量を大幅に減少させた. これは,負のプレュラー圧が左心室の排泄を阻害し,動脈圧の上昇に類似することを示唆しています.

科学分野:

心臓病学心臓病学
生理学生理学とは
核医学は,核医学である.

背景:

左心室噴出は胸内圧による影響を受けます.
ストレス下での心臓機能を評価するには,正確な測定技術が必要です.

研究の目的:

左心室のエジェクション分数と脳卒中の量にインスピレーション値の負荷が及ぼす影響を評価する.
ストレステストのための放射性核体心房学における呼吸門の有用性を調査する.

主な方法:

15人の健康な被験者に対して,呼吸器ゲート付きの放射性核素弁腔鏡検査が行われました.
静かな呼吸と,24cmのH2Oの値負荷に対して,吸入時に測定を行いました.

主要な成果:

インスピラトリースリーフローディングでは,エジェクション分数は64%から59%に減少した (p < .001).
ストローク数で表されるストロークの体積は9.6%減少した (p < .02).
終末シストリックカウントは有意に増加した (15.9%,p < .05),終末ダイアストリックカウントは有意な平均変化を示さなかった.

結論:

インスピレーションの負のプレッシャーは,左心室のエジェクションを阻害します.
圧迫呼吸中の呼吸器のゲート化は,心室ストレステストの制御された方法を提供します.

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