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Hypocalcemia is a medical condition characterized by low calcium levels in the blood serum. [5] The normal range of blood calcium is typically between 2.1–2.6 mmol/L (8.8–10.7 mg/dL, 4.3–5.2 mEq/L), while levels less than 2.1 mmol/L are defined as hypocalcemic.
Like hypocalcemia, hypercalcemia can be non-severe and present with no symptoms, or it may be severe, with life-threatening symptoms. Hypercalcemia is most commonly caused by hyperparathyroidism and by malignancy, and less commonly by vitamin D intoxication, familial hypocalciuric hypercalcemia and by sarcoidosis. [2]
Symptoms of hypernatremia may vary depending on type and how quickly the electrolyte disturbance developed. [27] Common symptoms are dehydration, nausea, vomiting, fatigue, weakness, increased thirst, and excess urination. Patients may be on medications that caused the imbalance such as diuretics or nonsteroidal anti-inflammatory drugs. [27]
First degree AV block does not generally cause any symptoms, but may progress to more severe forms of heart block such as second- and third-degree atrioventricular block. It is diagnosed using an electrocardiogram , and is defined as a PR interval greater than 200 milliseconds. [ 1 ]
Dialysis can, however, increase the excretion of calcium by developing hypocalcemia, thus possibly worsening the symptoms and signs of hypermagnesemia. The use of diuretics must be associated with infusions of saline solutions to avoid further electrolyte disturbances (e.g., hypokalemia ) and metabolic alkalosis .
Given the demographics of SCAD, it is important to maintain a high index of suspicion for the condition in otherwise low-risk women presenting with symptoms of acute coronary syndrome. Initial evaluation may show ECG changes of ST elevation, like heart attacks due to other causes. SCAD comprises 2-4% of all cases of acute coronary syndrome.
The diagnosis is typically based on finding low blood magnesium levels, also called hypomagnesemia. [6] Normal magnesium levels are between 0.6 and 1.1 mmol/L (1.46–2.68 mg/dL) with levels less than 0.6 mmol/L (1.46 mg/dL) defining hypomagnesemia. [1] Specific electrocardiogram (ECG) changes may be seen. [1]
Hyperphosphatemia causes acute kidney injury in tumor lysis syndrome, because of deposition of calcium phosphate crystals in the kidney parenchyma. [2] Hypocalcemia. Because of the hyperphosphatemia, calcium is precipitated to form calcium phosphate, leading to hypocalcemia. [2] Symptoms of hypocalcemia include (but are not limited to): [9] tetany