Aygen M, Popp R L
Am J Cardiol. 1987 Jul 1;60(1):147-52. doi: 10.1016/0002-9149(87)91002-2.
The role of myocardial fiber orientation in recognized patterns of echocardiographic images of ventricular muscle was explored. Skeletal muscle, postmortem hearts and excised myocardium confirmed the anisotropic echocardiographic characteristics of these muscles. The short-axis ventricular views in vitro and in vivo gave a distinct pattern of echo amplitudes within the myocardium that is consistent with fiber orientation as a major factor in this pattern. A different pattern in apical long-axis views of the basal septum and free wall also is consistent with fiber orientation, but detracts from attenuation as a major cause of "dropout" in short-axis views. Choice of an optimal echocardiographic view for evaluation of wall thickness and ventricular function may be influenced by improved understanding of the factors involved in image formation.
探讨了心肌纤维方向在已确认的心室肌超声心动图图像模式中的作用。骨骼肌、死后心脏和切除的心肌证实了这些肌肉的各向异性超声心动图特征。体外和体内的心室短轴视图在心肌内呈现出独特的回声振幅模式，这与纤维方向一致，是该模式的主要因素。基底间隔和游离壁的心尖长轴视图中的不同模式也与纤维方向一致，但削弱了衰减作为短轴视图中“失落”的主要原因。对图像形成所涉及因素的更好理解可能会影响评估室壁厚度和心室功能时最佳超声心动图视图的选择。
