Petralia S, Orlando E, Pierangeli A, Colì G, Antonelli M
G Ital Cardiol. 1979;9(12):1424-32.
Thirty-three subjects, fourteen of which with normal heart, ten with aortic insufficiency and nine with myocardiopathy, were studied by echocardiography and sfigmomanometric arterial pressure measurements. The ejection fraction EF, the left ventricular equatorial wall stress sigma, the corresponding left ventricular strain epsilon and the ratio E = sigma/epsilon have been determined for all subjects. The mean values of these quantities, at the onset of ventricular systole, for normal hearts are: EF = 0.67 +/- 0.05; sigma = (2.67 +/- 0.41) . 10(5) dine/cm2; E = (0.99 +/- 0.15) . 10(6) dine/cm2; for patients with aortic insufficiency: EF = 0.51 +/- 0.09; sigma = (2.74 +/- 1.10) . 10(5) dine/cm2; E = (1.51 +/- 0.69) . 10(6) dine/cm2; for patients with miocardiopathy: EF = 0.41 +/- 0.06; sigma = (4.36 +/- 2.08) . 10(5) dine/cm2; E = (3.20 +/- 1.19) . 10(6) dine/cm2. After a discussion on the significance of sigma and E parameters, it is inferred that E may be a useful measure of ventricular function. This parameter is different for distinct cardiac diseases and, within the limits of the same disease, probably will change according to seriousness.
对33名受试者进行了超声心动图检查和动脉血压测量，其中14人心脏正常，10人患有主动脉瓣关闭不全，9人患有心肌病。测定了所有受试者的射血分数EF、左心室赤道壁应力σ、相应的左心室应变ε以及比值E = σ/ε。在心室收缩开始时，正常心脏这些量的平均值为：EF = 0.67±0.05；σ = (2.67±0.41)×10⁵达因/平方厘米；E = (0.99±0.15)×10⁶达因/平方厘米；主动脉瓣关闭不全患者：EF = 0.51±0.09；σ = (2.74±1.10)×10⁵达因/平方厘米；E = (1.51±0.69)×10⁶达因/平方厘米；心肌病患者：EF = 0.41±0.06；σ = (4.36±2.08)×10⁵达因/平方厘米；E = (3.20±1.19)×10⁶达因/平方厘米。在讨论了σ和E参数的意义后，推断E可能是心室功能的一个有用指标。该参数在不同的心脏疾病中有所不同，并且在同一种疾病的范围内，可能会根据病情严重程度而变化。
