苯、甲苯、二甲苯(简称三苯)是化工生产的重要原料,挥发性强,主要经呼吸、皮肤侵入机体,长期接触一定量的三苯,可损害造血、神经、消化系统功能。但三苯引起对心血管系统的危害,特别是对心电图改变的有关报道不多,为了摸清工龄在十年以上,35—50周岁的196名职工长期接触“三苯”对心血管的影响,进行了心电图监护检查 现将结果报道于下: 一、调查对象与方法: 1.1 对象:接触组(为一线工人)138例,男80例,平均工龄18.3年;女58例,平均工龄16.8年;对照组 Benzene, toluene, xylene (referred to as triphenyl) is an important chemical production of raw materials, volatile, mainly by breathing, the skin invade the body, long-term exposure to a certain amount of triphenylbenzene, can damage hematopoietic, nerve, digestive system function. However, triphenylbenzene caused harm to the cardiovascular system, especially on ECG changes reported little, in order to find out the service life of more than 10 years, 35-50 years old 196 workers long-term exposure to “triphenyl” on the cardiovascular , The results were reported in the following: First, the survey subjects and methods: 1.1 object: contact group (frontline workers) 138 cases, 80 males, the average length of service 18.3 years; 58 females, the average length of service 16.8 years ; Control group