CRP and familial primary hypomagnesemia: Labs were significant for brain natriuretic peptide (BNP) of 1,341 pg/mL, creatinine of 0.7 mg/dL (baseline: 0.3 mg/dL), troponin of 0.47 ng/mL, corrected calcium of 12.1 mg/dL, PTH of 371 pg/mL, erythrocyte sedimentation rate (ESR) of 82 mm/hr, C-reactive protein (CRP) of 192 mg/L, hypokalemia at K 2.8 mEq/L, and hypomagnesemia at 1.4 mg/dL.