Effect of overweight on P-wave and QT dispersions in childhood

Area of Science:

• Pediatric Cardiology
• Electrophysiology
• Obesity Research

Background:

• Obesity's impact on cardiac electrophysiology is well-documented in adults but less so in children.
• Atrial conduction and ventricular repolarization are key indicators of cardiac health.
• P-wave dispersion (Pw-d) and QT dispersion (QT-d) are non-invasive measures of these parameters.

Purpose of the Study:

• To investigate the effects of overweight on atrial conduction and ventricular repolarization in children.
• To compare Pw-d and QT-d between overweight and normal-weight children.
• To explore correlations between these electrophysiological parameters and insulin resistance.

Main Methods:

• A cross-sectional prospective controlled study included 67 overweight and 70 normal-weight children.
• Electrocardiographic and anthropometric evaluations were performed on all subjects.
• P-wave dispersion and QT dispersion were analyzed and compared between the two groups.

Main Results:

• Homeostatic model assessment of insulin resistance was significantly higher in the overweight group.
• No statistically significant differences were found in Pw-d or QT-d between overweight and normal-weight children.
• Pw-d and QT-d did not correlate with insulin levels or body mass index.

Conclusions:

• Overweight in children does not appear to significantly alter atrial conduction or ventricular repolarization as measured by Pw-d and QT-d.
• Further research may be needed to understand long-term cardiac implications of childhood obesity.