apex beat,apex impulse

Significance of Left Ventricular Opacification for Dignosis of Apical Anterior and Lateral Wall Shape and Movement;

左室显影对前壁侧壁心尖段形态和运动的诊断意义

The Clinical Significance of 2-D Echocardiography on Left Ventricle Apical Short Axis Rotatory Moving in Systole;

2-D超声心动图观察心尖部短轴收缩期钟向旋转的临床意义