Özet:

Objective: The aim of this study was to investigate the impact of childhood obesity on ventricular functions using tissue Doppler echocardiography. Materials and methods: The mitral tissue Doppler signals were recorded in the apical four-chamber view, with the sample volume placed at the lateral walls of mitral annu­lus. The mitral flow was examined with the sample Pulse Doppler positioned parallely to flow just at the orifice of the mitral leaflets. Twenty obese (161.50±25.78 months) and 20 healthy children (151.15±33.48 months) were included to this study. Results: Body mass index (BMI) was significantly higher in obese group (30.92±6.87). Isovolumic relaxation time (IVRT) which is one of the left ventricular (LV) diastolic function parameters was 66.10±7.30 ms in obese group, and 58.70±9.06 ms in the control group. IVRT was sig­nificantly higher in the obese group (p=0.007). In obese group, the mitral annulus tissue Doppler E velocity was decreased, flow velocity was increased and decrement in Em/Am ratio was significant. We found significant negative correlation between BMI and LV Em/Am ratio. Myocardial performance index (MPI) in obese group and control group was 0.50±0.07 and 0.41±0.04, respectively (p=0.000). Between MPI and LV Em/Am ratio there was a significant negative correlation while MPI showed positive correlation with BMI. In obese group septal and LV posterior wall thick­ness was shown to be significantly increased compared to the control group (p=0.000). Conclusion: Our findings, may be important for determina­tion of the relationship between obesity and cardiovascular risk factors in children. Tissue Doppler echocardiographic imaging may be useful in revealing this relationship.

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