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我老伴七十多岁了,患心脏病,白天心率每分钟 50多次,晚上只有40多次,请问在什么情况下需要安装心脏起搏器? 北京李华
My husband is seventy years old, suffering from heart disease, daytime heart rate more than 50 times per minute, only 40 times at night, may I ask in what circumstances need to install a pacemaker? Beijing Li Hua