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根据最新指南,慢性心力衰竭(心衰)按照左心室射血分数(left ventricular ejection fraction,LVEF)分为射血分数降低的心衰(heart failure with reduced ejection fraction,HFrEF)、射血分数保留的心衰(heart failure with preserved ejection fraction,HFpEF)及射血分数中间值的心衰(heart failure with mid-rangeejection fraction,HFm