患者,男,60岁,因扩张型心肌病、心脏扩大、心功能Ⅳ级、心电监测呈现频发室性期前收缩伴短阵发性室性心动过速而来院。对该患者治疗应首选的方法是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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