彩色多普勒超声显像特殊二尖瓣反流形态与二尖瓣(装置)病变的关系
채색다보륵초성현상특수이첨판반류형태여이첨판(장치)병변적관계
The relation between the color doppler flow imaging(CDFI)of exceptional mitral regurgitation and the mitral valve(device)lesions
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