Qirko S, Goda T, Rroku L I
Service de cardiologie, centre hospitalier, Albanie.
Arch Mal Coeur Vaiss. 1999 Aug;92(8):971-4.
The left atrial ejection force (LAEF), defined as that force exerted by the left atrium (LA) to accelerate the blood into the left ventricle during atrial systole, is well accepted for the evaluation of LA systolic function. The aim of this study is to determine whether LAEF is a precursor of the impairement of LV systolic function in patients with arterial hypertension (HTN). For that purpose we studied LAEF in 36 patients with HTN (av. age 58 +/- 8 years) with LV hypertrophy (Lvmi > 134 g/m2 for men and > 110 g/m2 for women). LV systolic function estimated by the fractional shortening (FSh) was 35 +/- 4% (28 to 44); 32 normal subjects (NS) were also analyzed. All subjects were submitted to echo and doppler examinations.
LAEF was obtained by the formula: 1/3 x MVA x (A-vel)2, where MVA is mitral valve area measured by 2D echo while A-vel. is the late diastolic (atrial) mitral velocity.
左心房射血力(LAEF)定义为心房收缩期左心房(LA)将血液加速泵入左心室所施加的力,它在评估左心房收缩功能方面已被广泛接受。本研究的目的是确定LAEF是否是动脉高血压(HTN)患者左心室收缩功能受损的先兆。为此,我们研究了36例患有左心室肥厚(男性左心室质量指数>134 g/m²,女性>110 g/m²)的HTN患者(平均年龄58±8岁)的LAEF。通过缩短分数(FSh)评估的左心室收缩功能为35±4%(28%至44%);还分析了32名正常受试者(NS)。所有受试者均接受了超声心动图和多普勒检查。
LAEF通过以下公式获得:1/3×二尖瓣口面积(MVA)×(A波速度)²,其中MVA通过二维超声心动图测量,而A波速度是舒张晚期(心房)二尖瓣速度。