患者男性,66岁。冠心病多年。胸闷、心慌2年余,1年前有脑血栓史。查体:心律完全不规则,心音强弱不等,室律120~180次,有脉搏短绌。该心律失常的常见并发症是()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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