What should be monitored when a patient is receiving IV calcium?

When a patient is receiving intravenous calcium, monitoring cardiac function and signs of arrhythmias is essential due to the critical role calcium plays in cardiac muscle contraction and electrical conduction. Calcium is a vital electrolyte that influences the heart's rhythm and contractility. Abnormal levels of calcium can lead to significant cardiovascular effects, including arrhythmias and changes in heart rhythm, which can be life-threatening.

Monitoring cardiac function includes observing the heart rate, rhythm, and any signs of irregular heartbeat or dysrhythmias through electrocardiogram (ECG) assessments. Calcium administration can lead to conditions such as bradycardia or even cardiac arrest if not properly managed. Therefore, vigilance in assessing cardiac status is crucial for patient safety during treatment with IV calcium.

While the other options involve important health parameters, they do not address the specific risks associated with calcium administration and its direct impact on the cardiovascular system, making cardiac monitoring the priority in this scenario.