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心梗恢复后用β阻滞剂一年或以上者,可预防猝死及心梗复发,使病死率降低20％左右。静注心得安限制梗塞范围,可用血清酶水平来估计。随后的临床试验用非心脏性或心脏选择性β阻滞剂也证实了这一点。噻吗心安、氨酰心安和美多心安能减少心梗引起的心电图R波降低,后二者还能减轻胸痛。然而,梗塞复原后左心室功能研究提示,酶及心电图表示的梗塞范围减少20％左右,对心功能尚无重要的保护作用。
Recovery of myocardial infarction with beta blockers for one year or more, can prevent sudden death and myocardial infarction recurrence, the mortality rate decreased by about 20%. Intravenous distraction limits the extent of infarction, serum enzyme levels can be used to estimate. Subsequent clinical trials with non-cardiac or cardiac selective β-blocker also confirmed this. Timolol, atenolol and moxibustion can reduce myocardial infarction caused by R wave ECG decreased, the latter two can reduce chest pain. However, studies of left ventricular function after infarction recovery suggest that the infarct size of enzymes and ECGs is reduced by about 20%, and there is no significant protective effect on cardiac function.