Chvostek's sign indicates which electrolyte abnormality?

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Multiple Choice

Chvostek's sign indicates which electrolyte abnormality?

Explanation:
Chvostek's sign reflects increased neuromuscular excitability caused by low calcium. When calcium levels drop, nerves become more easily depolarized, so a light tap over the facial nerve triggers contractions of the facial muscles on that side. This positive facial twitch is a classic clue to hypocalcemia, rather than to the other electrolyte abnormalities listed. While severe hypomagnesemia can contribute to low calcium, the hallmark association remains with hypocalcemia.

Chvostek's sign reflects increased neuromuscular excitability caused by low calcium. When calcium levels drop, nerves become more easily depolarized, so a light tap over the facial nerve triggers contractions of the facial muscles on that side. This positive facial twitch is a classic clue to hypocalcemia, rather than to the other electrolyte abnormalities listed. While severe hypomagnesemia can contribute to low calcium, the hallmark association remains with hypocalcemia.

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