大量流行病学研究表明,许多心衰患者的左室射血分数( LVEF )正常,此类心力衰竭称为左室射血分数保留的心衰( heart failure with preserved EF , HFpEF ) ,占出现心衰症状与体征患者的50% ,且发病率逐年上升。其发病率、死亡率和治疗费用都与左室射血分数降低的心衰( heart failure with reduced EF HFrEF )相似[ 1 ] 。在I - PRESERVE ( Irbesartan in Heart Failure With Preser ......