Table 1. Patient's initial investigations.

Lab	Value	Reference range
Potassium	5.7 mmol/L	3.5 - 5.0 mmol/L
Phosphorus	7.2 mg/dL	2.2 - 4.6 mg/dL
Calcium	8.5 mg/dL	8.6 - 10.5 mg/dL
Creatinine	2 mg/dL	0.70 - 1.30 mg/dL
White blood cell count	28 K/uL	3.73 - 10.10 K/uL
Hemoglobin	10.7 g/dL (14.4 g/dL eight months prior)	13.4 - 16.8 g/dL
Platelet count	284 K/uL	146 - 337 K/uL
Brain natriuretic peptide	944 pg/mL	0 - 100 pg/mL
Troponin	263 ng/L	<53 ng/L
Lactate	17 mmol/L	0.5 - 1.6 mmol/L