患儿，男，7mo。因反复咳喘3mo，近6d患儿哭闹时有口唇发绀入院。体检：体温37℃，脉搏180次／min，呼吸68次／min，体重7kg。神志清楚，面色苍白，呼吸急促，双肺呼吸音粗，心前区膨隆，无震颤，心界向两侧扩大，心率180次／min，律齐，胸骨左缘第2，3肋间可闻及Ⅲ级粗糙收缩 Children, male, 7mo. Due to repeated cough 3mo, nearly 6d when children crying cyanosis admission. Physical examination: body temperature 37 ℃, pulse 180 beats / min, breath 68 beats / min, weight 7kg. Conscious, pale, shortness of breath, lung breath sounds crude, precordial swelling, no tremor, the heart to both sides of the expansion, heart rate 180 beats / min, law Qi, And grade Ⅲ rough contraction