May 22, 2012
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Risk for CVD evident in obese adolescents

Early cardiac functional disturbances may explain the obesity risk for cardiac disease in asymptomatic adolescents, researchers said at the European Society of Cardiology 2012 Heart Failure Congress.

Results of a study of 97 healthy adolescents (mean age, 12.6 years) showed that, as BMI increased, so did interventricular septal wall thickness (lean children, 0.84 cm; overweight, 0.88 cm; obese, 0.96 cm) and left ventricular posterior wall thickness (lean, 0.78 cm; overweight, 0.8 cm; obese, 0.94 cm; P=.001 for both). Parallel to BMI, researchers also found increases in relative wall thickness (lean, 0.34; overweight, 0.34; obese, 0.4) and LV mass index (lean, 47.7 g/m2; overweight, 51.9 g/m2; obese, 65.2 g/m2; P=.001 for both). The measures of heart size were made using electrocardiogram information.

Researchers also assessed measures of heart function. They found that only obese adolescents had reduced LV early diastolic lateral velocity (lean, 15.3 cm/s; overweight, 13.6 cm/s; obese, 10.5 cm/s; P=.001) and septal velocity (lean, 12.2 cm/s; overweight, 11.1 cm/s; obese, 9.8 cm/s; P=.003). The same reductions in systolic velocities were also observed in obese adolescents only: early systolic lateral velocity (lean, 9.2 cm/s; overweight, 9.3 cm/s; obese, 8.0 cm/s; P=.001) and septal velocity (lean, 9.05 cm/s; overweight, 9.0 cm/s; obese, 7.6 cm/s; P=.014). LV lateral diastolic (P=.001) and systolic (P=.005) velocities correlated with BMI, the researchers said.

For the study, adolescents were divided into groups based on BMI: lean (n=32), overweight (n=33) and obese (n=32).

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Disclosure: The researchers report no relevant financial disclosures.