PTH and familial primary hypomagnesemia: Therapy of hypokalemia, hypocalcemia, and hypomagnesemia should be an emergency and performed simultaneously, under electrocardiographic monitoring in patients with renal failure, and sympathetic activity, serum phosphates and iron, PTH level, renal function, hemoglobin and hematocrit, pH, inflammatory markers, proteinuria and microalbuminuria, and osmolarity should be monitored, besides standard 12-lead ECG in order to prevent ventricular arrhythmia and sudden cardiac death.