最大呼吸流量(PEF)变异率达到怎样的标准,可诊断为哮喘() ["日内或昼夜波动率≤10%","日内或昼夜波动率≥20%","日内或昼夜波动率≥10%","日内或昼夜波动率≤20%","无变化"]
女性,35岁,搬入新居后频繁咳嗽并气喘,查体肺部有哮鸣音,考虑诊断为() ["肺炎","肺梗死","胸腔积液","自发性气胸","支气管哮喘"]
室性期前收缩的心电图表现是什么?
可确诊支气管扩张的诊断方法为() ["支气管造影","支气管镜检查","详细的病史","肺部前后位X线片","用上述检查方法均无效"]
支气管扩张发病的机制是() ["支气管-肺组织感染及阻塞","肺结核","肿瘤压迫","支气管先天性发育缺损和遗传因素","支气管内结石"]
急性心肌梗死有哪几种基本心电图变化?