Korean J Biol Psychiatry.
2012 Feb;19(1):38-44.
Conduction Abnormalities and Associated Factors in Korean Patients with Eating Disorders
- Affiliations
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- 1Department of Psychiatry, Inje University Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea. youlri.kim@paik.ac.kr
- 2Department of Internal Medicine, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea.
- 3Department of Internal Medicine, Vision 21 Cardiac and Vascular Center, Ilsan Paik Hospital, Goyang, Korea.
Abstract
OBJECTIVES
QT interval prolongation and dispersion known as indicators of an increased risk for ventricular arrhythmias and sudden death have been reported to be prolonged in patients with anorexia nervosa. The aims of this study were to compare conduction abnormalities in Korean patients with anorexia nervosa and bulimia nervosa, and to examine its relation with clinical and laboratory factors.
METHODS
We retrospectively examined 45 women with anorexia nervosa and 75 women with bulimia nervosa who were assessed by 12-lead electrocardiogram at baseline. QT interval and corrected QT interval, QT dispersion of the difference between the longest and shortest QT intervals, and abnormal U wave were measured for conduction abnormalities.
RESULTS
QT interval was significantly longer in patients with anorexia nervosa compared with those with bulimia nervosa. There were no differences in QTc (Corrected QT), QTd (QT dispersion) and abnormal U wave between patients with anorexia nervosa and those with bulimia nervosa. QTd was significantly correlated with the lowest ever lifetime body mass index (kg/m2) as well as the serum amylase level in patients with anorexia nervosa.
CONCLUSIONS
These results suggest some conduction abnormalities reported in patients with anorexia nervosa are also found in patients with bulimia nervosa. It appears that severity of weight loss and purging behavior could affect the cardiac arrhythmia in patients with eating disorders. Appropriate attention should be paid to cardiac involvement in patients with eating disorders.
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