高龄冠心病患者血清脑利钠肽、左室射血分数与心功能分级的相关性研究
고령관심병환자혈청뇌리납태、좌실사혈분수여심공능분급적상관성연구
Study on the relationship between serum brain natriuretic peptide, left ventricular ejection fraction and cardiac function in senile patients with coronary heart disease
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