Calcium
Phosphate, Magnesium
PTH
Lipase
Urinalysis
ECG
Ionized Ca
Prolonged PR & QRS
Widened T waves
Bradyarrhythmias / heart block
Short QT
STE/STD, can mimic Myocardial Infarction
Hypercalcemia
Addison's disease
Hypocalcemia
Calciphylaxis
Ketonemia
Excess vitamin D
Hyperammonemia
Hypercalcemia of malignancy