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Percent composition of the plasma fatty acids in 48 children with simple obesity was determined with gas-chromatography. Thirty seven healthy, normotensive children served as the control group. An increased content of the saturated fatty acids and decreased content of the unsaturated fatty acids together with the decrease in unsaturated fatty acids:multi-unsaturated fatty acids ratio were seen in children with simple obesity.

The studied group comprised 82 children with simple obesity. In the group the character and frequency of ECG changes in 12 conventional leads were analyzed. A correlation was established between the character and frequency of these changes and the degree of overweight and obesity duration. In children with simple obesity a considerable prevalence was observed of disturbances of sinus rhythm, impairment of intraventricular conduction and signs of left ventricular hypertrophy. The observed changes were more frequent in children with over 5 years of obesity duration. No correlation was demonstrated between the incidence of these changes and the degree of overweight.

Plasma fatty acids contents and dynamics of the left cardiac ventricle contractions were determined in 48 children with simple obesity. Significant deterioration of the dynamics of left ventricle contractions was seen in obese children. It included prolongation of QSIIJ, QI, and PEPI and shortening of LVETI. Correlation of the total contraction time, pre-ejection period and contractility index with plasma saturated and unsaturated fatty acids levels has been demonstrated.