Analysis of the cardiac structure and function indicators of overweight and obese children aged 6-7

Objective To understand the cardiac structure and function indicators of overweight and obese children aged 6 -7 and its influencing factors,and then to provide theoretical basis for early effective intervention.Methods Part of the first grade students from five primary schools in Beijing were selected to participate in characteristic sports education program in 2014,and according to BMI diagnostic criteria,these students were divided into three groups:normal,overweight and obese.And then ultrasonic test was conducted on them to observe its change rules and influence factors.Results The detection rates of overweight and obesity of children aged 6-7 in Beijing were 18.3% and 19.7% respectively;the detection rates of the boy's overweight and obesity (10.0% and 12.0%) were higher than those of girl' s (8.3% and 7.7%),the difference was statistically significant (P<0.01);Obese children's IVSd,the IVSs,LVIDd,LVIDs,LVPWd,LVPWs,EDV,AOD,the LVM,LVMI,CO,the SV were significantly higher than those of normal children(P<0.05);Overweight children's IVSd,the IVSs,AOD,the LVM were significantly higher than those of normal children(P<0.05);Obese children' s LVIDd,EDV,the LVM,CO,the SV were all significantly higher than overweight children (P<0.05).The main influencing factors of children's LVM were the waist-to-hip ratio,hip circumference,gender and body fat rate,among which waist-to-hip ratio played the leading role;LVMI's main affecting factors were the waist-tohip ratio,hip circumference,BMI and body fat rate,and waist-to-hip ratio played the leading role.The risk of left ventricular hypertrophy was found no increase among children aged 6-7 with different types of obesity.Conclusion Overweight and obese children's left ventricular wall thickened,left ventricular inner diameter enlarged,and left ventricular mass increased,and it has appeared high hemodynamic state,especially in obese children;thus,we should pay attention to the increase of obese children' s waist hip ratio,and body fat rate,especially the waist-to-hip ratio.