6个月大婴儿,突然出现呼吸困难,面色苍白,烦躁不安,心率160次/分,第一心音可闻及奔马律,肝于肋缘下4cm处可及,X线检查心脏外形为球形扩大搏动减弱,诊断为心内膜弹性纤维增生症,其充血性心衰类型为
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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