A 35-year-old woman on long-term proton pump inhibitor therapy presents with weakness and recurrent palpitations. She has had two prior admissions for torsades de pointes. Laboratory studies show magnesium 1.0 mEq/L, calcium 7.8 mg/dL, and potassium 3.2 mEq/L. Which of the following is the most likely primary abnormality driving this constellation?
- A)HypomagnesemiaGABARITO
- B)Hypophosphatemia
- C)Hypercalcemia
- D)Hyperchloremia
- E)Hypernatremia
Explicação
Hypomagnesemia can lead to ventricular arrhythmias, secondary hypocalcemia, and refractory hypokalemia. Chronic PPI use is a recognized cause. Ver explicação completa e trilha adaptativa →