Correlations between body size, left ventricular mass index, wall thickness, and left ventricular internal dimension in diastole of normal Thai children aged 10 - 15 years by echocardiography

Background: In terms of the left ventricular internal dimension in diastole (LVIDd), wall thickness and left ventricular mass index (LV mass index), the researcher was investigated to determine whether the parameter is correlated to the body size or the body surface area (BSA). Objective: This study aimed to study the correlation of BSA, LVIDd, wall thickness (IVSd, PWd), and LV mass index, also including comparison of four parameters in group body mass index (BMI) < 18.5 and group > 18.5 kg/m2 Methods: Retrospective review of the echocardiographic report of Thai children 10 - 15 years old. The spearman correlation was used to determine correlation and Mann - Whitney U test was used to analyze in four parameters in group BMI < 18.5 and group > 18.5 kg/m2 Results: The spearman correlation coefficient value described moderately significant correlation in BSA vs. LVIDd were (rs= 0.5, P < 0.05) and BSA vs. LV mass index (rs= 0.6, P < 0.05) were similar. However, the wall thickness consisting of BSA vs. PWd (rs= 0.3, P = 0.14) and BSA vs. IVSd were not correlated (rs= - 0.7, P = 0.68). In the comparison between groups, i.e., BMI < 18.5 and group > 18.5 kg/m2, this study showed two parameters with significant differences consisting of LV mass index (86.8 ± 14.9 vs. 102.0 ± 17.7 g/m2) and LVIDd only (4.0 ± 0.3 vs. 4.2 ± 0.2) (P < 0.05). Conclusion: Both the left ventricular dimension and mass index were significantly correlated with body size or body surface area.