虽然已有很多研究说明 ACE抑制剂能降低左心功能不全患者的死亡率 ,但尚未有充分的研究来评价 β-阻滞剂和ACE抑制剂二者之间的协同作用。本文旨在评价β-阻滞剂与降低左室功能不全患者死亡率之间的联系及其特异性 ,并且在随机给予依拉普利治疗的患者中 ,加用 β-阻滞剂是否能 Although many studies have shown that ACE inhibitors can reduce the mortality of patients with left ventricular dysfunction, there is not enough research to evaluate the synergy between β-blockers and ACE inhibitors. This article aims to evaluate the association and specificity of β-blockers with reduced mortality in patients with left ventricular dysfunction and to determine whether the use of β-blockers in patients randomized to enalapril can