PMC7376418_01
Electrocardiography on arrival in the emergency department demonstrating a prolonged QT interval (QT 442 ms and QTc 531 ms).
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Electrocardiography showed a prolonged QT interval (Figure 1), abdominal X-ray showed accumulation of intestinal gas, and abdominal computed tomography showed bowel distension with wall edema.
Changes in serum Mg values over time.
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By day 3, serum Mg level had almost normalized, at 2.5 mg/dl (Figure 2).