Effect of weight loss on QT dispersion in obesity.

Abstract

QT dispersion shortens in most patients (89.5%) using liquid protein diet for weight loss. However, increase of QT dispersion is seen in 10.5% of patients. The cause of increased QT dispersion in obesity (before weight loss) differs from that in patients after weight-loss using liquid protein diet. QT dispersion changes observed in this study may explain the risk of sudden cardiac death in these patients.