前頭部ミトラル小葉の動きは,基礎停留弦によって制限されています

Wolfgang A Goetz¹, Hou-Sen Lim, Filip Pekar

¹The International Heart Institute of Montana Foundation at St Patrick Hospital and Health Sciences Center and University of Montana, 554 W Broadway, Missoula, Mont 59802, USA.

Circulation

|June 11, 2003

まとめ

前頭基底停留弦は前頭部ミトラルの運動を制限する. これらのコードを切断すると,小葉の動きが増加し,ダイアストリック左心室の詰め込みとシストリック流出に役割があることを示唆しています.

科学分野:

心血管の解剖学について
心臓のバイオメカニクス
ミトラル弁の生理学ミトラル弁の生理学

背景:

前頭基礎停留弦は,心臓の循環全体を通して前頭部ミトラレフレット運動を制限すると仮定されています.
これらの構造は,左心室内の血流の動態を調節する役割を果たすと考えられています.

研究の目的:

前部基礎停留弦が前部ミトラリーフレット (AL) 運動に及ぼす機械的影響を調査する.
心循環中のALダイナミクスに対するステイコード切断の効果を定量化するために.

主な方法:

ソノミクロメトリック結晶を羊に埋め込み,AL,ミトラアヌルス,ステイコード挿入 (S1,S2) を含むキーポイント間の距離を測定した.
測定は,前部ベースストイアコードの外科的切断前と後を記録した.
ALおよび関連する構造の角的および線形的な移位は,心臓の循環を通して分析されました.

主要な成果:

前頭部側頭葉 (AL) は,心循環中に重要な角運動を示し,S1とS2で特定の変化が観察されました.
ダイアストール時,ALは,EとAの両方の波の間のステイコードによって形成された平面を横切った.
停留弦の切断により,ALの横向運動が著しく増加した (P<0.05).

結論:

ステイコードは横側ALの動きを制限するが,中部はそれらの間を自由に移動し,ダイアストール中の帆のように機能する.
このメカニズムは,ダイアストリックの左心室の流入とシストリックの流出トンネルに寄与します.
横側AL運動の増加は,停留コードの切断後に観察され,その制限的役割を強調しました.

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