Case Report
Prolonged QT Syndrome and Seizure Secondary to Alkaline Earth Metal Deficiency: A Case Report
Table 3
Causes of hypocalcemia.
| Factitious (sample contamination with EDTA) | Normal plasma ionised with reduced total calcium (hypoalbuminaemia) | Reduced plasma ionised with normal total calcium (respiratory alkalosis, citrate toxicity found in transfusion) | Reduced plasma ionised and total calcium | (i) Decreased PTH activity (hypoparathyroidism, pseudohypoparathyroidism, and hypomagnesaemia) | (ii) Vitamin D deficiency | (iii) Excessive calcium losses (critical illness, malabsorption, pancreatitis, and diuresis) |
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