Key result
IV calcium and magnesium converts narrow complex tachycardia to sinus rhythm in severe hypocalcemia.
Case Report (n=1)
No
Hypocalcemia secondary to untreated idiopathic hypoparathyroidism can be a rare cause of sustained narrow complex tachycardia.
Should not change tachycardia management based on one case; leaves open hypothesis of reversible trigger in severe hypocalcemia.
Calcium is an essential electrolyte in impulse generation and contraction of cardiac muscle. Hypocalcemia can occur in cases of parathyroid hormone deficiency, primarily due to inadvertent removal of the parathyroid gland during thyroidectomy, however most cases are idiopathic. We present a case of an adult male who developed sustained narrow complex tachycardia due to hypocalcemia in the setting of untreated idiopathic hypoparathyroidism.
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Khalid et al. (2023) conducted a case report in Hypocalcemia and Supraventricular Tachyarrhythmia (n=1). Intravenous calcium and magnesium was evaluated on Resolution of narrow complex tachycardia. Intravenous calcium and magnesium repletion abruptly converted a sustained narrow complex tachycardia to normal sinus rhythm in a patient with severe hypocalcemia.
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