3) A 16 year-old woman with amenorrhea and BMI 14 presents with generalized weakness and bradycardia.

• 3) A 16 year-old woman with amenorrhea and BMI 14 presents with generalized weakness and bradycardia.

• Labs:

• Na 128 Cl 101 BUN/creatinine 18/.8

• K 2.8 Bicarb 20

• Urinary electrolytes: Na 8 K 5 Cl 12

• Select the most likely electrolyte disorder:

• Diuretic abuse

• Laxative abuse

• Hypokalemic periodic paralysis

• Gitelman’s syndrome

• Surreptitious vomiting