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红细胞分布宽度（ red blood cell distribution width ，RDW）作为血常规中的一项参数，反映红细胞大小异质性。近年来的研究证实，RDW值与心血管疾病间具有重要相关性，RDW值升高预示急性冠状动脉综合征患者不良预后，RDW是急性冠状动脉综合征患者预后的独立预测因子。现就RDW值在急性冠状动脉综合征患者预后、作用机制及其临床应用价值的研究进展做一综述。“,”As a parameter routinely measured by most modern hematology analyzers ,red blood cell distribution width ( RDW) reflects variability in the size of circulating red blood cells .Increasing RDW is an indicator for the adverse prognosis of acute coronary syndrome and can be an independent predictor for the prognosis of cardiovascular disease .The aim of this review is to describe the prognostic utility of RDW in patients with acute coronary syndromes and to elucidate the mechanism and clinical application underlying the relationship between elevat -ed RDW values and poor patient prognosis .