title: [Effects of electromagnetic radiation in metropolis environment on teenagers' electrocardiogram and blood cells].
abstract: OBJECTIVE
  Our previous investigation indicated that electromagnetic radiation level of city environment in some frequency range has gotten close to national standard limits. This study is to investigate the effects of these frequency electromagnetic waves coexisted in same environment on teenagers' electrocardiogram and blood cells.
  
  
  METHODS
  Electrocardiogram and blood cells were examined in 106 cases of teenagers by using electrocardiograph and blood counting instruments respectively.
  
  
  RESULTS
  There were not significantly different in heart rate, P-R interphase, QRS-wave time, Q-T interphase, blood hemoglobin content and blood platelet number in teenagers between high and low electromagnetic radiation environment (P > 0.05). The total blood leucocyte number in teenagers was statistically lower in high electromagnetic radiation environment than that in low electromagnetic radiation environment (P < 0.05). With regard to classification of blood leucocyte, the blood monocyte number in 14 - 18 years old of teenagers and the blood eosinophil number in boy were significantly higher in high electromagnetic radiation environment than those in low electromagnetic radiationenvironment (P < 0.05).
  
  
  CONCLUSIONS
  The electromagnetic radiation nowadays in metropolis environment may have no harmful effects on teenagers' electrocardiogram and have harmful effects on teenagers' blood leucocyte-mainly showing decreased total blood leucocyte number, increased percentages of monocyte and eosinophil number.
authors.affiliation: Department of Occupational Hygiene, College of Preventive Medicine, Third Military Medical University, Chongqing 400038, China.
authors.forename: Yan-Wen
authors.initials: YW
authors.lastname: Zhang
authors.forename: Guang-Bin
authors.initials: GB
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Tian
authors.forename: Zhou
authors.initials: Z
authors.lastname: Zhou
mesh_terms: D000293:Adolescent; D001773:Blood Cells / Q000528:radiation effects*; D002947:Cities; D004562:Electrocardiography / Q000528:radiation effects*; D004574:Electromagnetic Fields / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D014505:Urban Population; D055815:Young Adult