For a child with hypocalcemia, which manifestation is expected?

For a child with hypocalcemia, which manifestation is expected?

• A. Hypotension
• B. Hypertension
• C. Hyperactivity
• D. Tachypnea

Answer: (A)

Low calcium affects both nerves and the heart. Calcium helps stabilize nerve membranes, so when levels drop, nerves become more excitable, which leads to signs like tetany and muscle cramps. But calcium is also crucial for cardiac muscle contraction; with hypocalcemia, the heart contracts less forcefully, which can drop the blood pressure. That cardiovascular effect makes hypotension a typical, expected finding in hypocalcemia. Hypertension is not characteristic of low calcium. Signs of neuromuscular hyperactivity can occur, but they’re not as systemic or as directly tied to blood pressure as the hypotension seen with impaired cardiac contractility. Tachypnea isn’t a classic direct manifestation of hypocalcemia either. The most consistent systemic sign to look for in this context is low blood pressure due to decreased cardiac contractility.

Low calcium affects both nerves and the heart. Calcium helps stabilize nerve membranes, so when levels drop, nerves become more excitable, which leads to signs like tetany and muscle cramps. But calcium is also crucial for cardiac muscle contraction; with hypocalcemia, the heart contracts less forcefully, which can drop the blood pressure. That cardiovascular effect makes hypotension a typical, expected finding in hypocalcemia.

Hypertension is not characteristic of low calcium. Signs of neuromuscular hyperactivity can occur, but they’re not as systemic or as directly tied to blood pressure as the hypotension seen with impaired cardiac contractility. Tachypnea isn’t a classic direct manifestation of hypocalcemia either. The most consistent systemic sign to look for in this context is low blood pressure due to decreased cardiac contractility.