二维超声心动图和M型超声心动图评价左心室扩大患者左心室收缩功能的对比研究
이유초성심동도화M형초성심동도평개좌심실확대환자좌심실수축공능적대비연구
The evaluation of left ventricnlar systolic function by two-dimensional and M-mode echocardiography in patients with left ventricle enlargement
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