The nurse prepares the ECG for the new patient on the Eating Disorders Unit. The nurse knows that QT-prolongation can be a complication of

A. Rumination Disorder: This disorder involves repeated regurgitation of food without associated electrolyte disturbances or cardiac conduction changes. QT prolongation is not a common complication. B. Anorexia Nervosa: Severe malnutrition and electrolyte imbalances, especially hypokalemia, hypomagnesemia, and hypocalcemia, can lead to QT-interval prolongation. This increases the risk of life-threatening arrhythmias and requires careful cardiac monitoring. C. Binge Eating Disorder: While this disorder can contribute to obesity and metabolic syndrome, it is not typically associated with electrolyte disturbances or QT prolongation. Cardiac risk arises mainly from long-term cardiovascular effects rather than acute conduction abnormalities. D. Avoidant Restrictive Food Intake Disorder (ARFID): Although ARFID can lead to nutritional deficiencies, it is less commonly associated with severe electrolyte disturbances or QT prolongation compared with anorexia nervosa. Cardiac monitoring may still be indicated depending on nutritional status.