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Prolonged QT interval in bulimia nervosa.
Ryan Buchanan1, Joseph Ngwira, Khaled Amsha
1Department of Renal Medicine, Queen Alexander Hospital, Cosham, Portsmouth, UK.
BMJ Case Reports
|June 16, 2012
Summary
This case highlights how bulimia nervosa can cause severe electrolyte disturbances, leading to dangerous cardiac arrhythmias like QTc prolongation. Prompt potassium replacement and psychiatric care are crucial for recovery.
Area of Science:
- Cardiology
- Psychiatry
- Internal Medicine
Background:
- Bulimia nervosa is an eating disorder associated with significant electrolyte disturbances.
- Electrolyte imbalances, particularly hypokalemia, can precipitate serious cardiac complications.
Observation:
- A 39-year-old woman presented with recurrent syncope.
- Investigations revealed marked QTc prolongation (642 ms) and severe hypokalemia (1.8 mmol/l).
Findings:
- The patient admitted to binge eating and self-induced vomiting, consistent with bulimia nervosa.
- Treatment with potassium replacement led to normalization of serum potassium and QTc interval.
Implications:
- This case underscores the critical link between eating disorders and cardiac health.
- Early recognition and management of electrolyte abnormalities in bulimia nervosa are vital to prevent life-threatening arrhythmias.
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