Excess weight in children and adolescents is associated with altered subendocardial blood supply among girls but not boys.

Subendocardial viability ratio (SEVR) is a reliable index of myocardial supply-workload balance. This study sought to investigate whether overweight/obese children and adolescents have altered SEVR and to identify which are the associated factors. This cross-sectional study involved 789 individuals. Central haemodynamic was measured by radial applanation tonometry. Diastolic time was shorter (496 ± 122 vs 537 ± 140 ms, P = .014) and diastolic pressure-time index was lower (2681 ± 412 vs 2814 ± 423 mm Hg seconds, P = .024) in overweight/obese compared with eutrophic girls. SEVR was lower in girls than in boys (1.34 ± 0.39 vs 1.48 ± 0.41, P = .018) but only among overweight/obese. SEVR may be affected by small variations in the temporal determinants of cardiac cycle.