一、对象和方法 (一)对象 1.研究组 1995年1月1日～1999年12月30日期间住院患儿,临床诊断为支气管肺炎伴心力衰竭。年龄2天～4.5岁。男21例,女16例。 2.对照组 同期支气管肺炎患儿40例,年龄23天～5岁,男28例,女12例;同期儿保体检的健康儿童12例,年龄2岁～4岁,男8例,女4例。 First, the object and method (A) of the object 1. Study group January 1, 1995 ~ December 30, 1999 hospitalized children, the clinical diagnosis of bronchial pneumonia with heart failure. Age 2 days to 4.5 years old. There were 21 males and 16 females. In the control group, 40 children with bronchopneumonia at the same period were aged from 23 days to 5 years old, 28 males and 12 females; 12 healthy children under the age of 2 to 4 years old, 8 males and 4 females example.