

老年退行性心脏瓣膜病与冠心病关系的研究
The study of the relationship between senile degenerative heart valvular disease and coronary artery disease
心脏瓣膜疾病 / 冠状动脉硬化 / 超声心动描记术 / 多普勒 / 彩色
heart valve diseases / coronary arteriosclerosis / echocardiography / Doppler / color
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