Which of the following is a symptom of hyperkalemia?

Hyperkalemia, which is an elevated level of potassium in the blood, can manifest through various symptoms and signs. Among those, abdominal distension is particularly notable because potassium plays a critical role in muscle function, including the muscles of the gastrointestinal tract. Increased potassium levels can lead to reduced bowel motility, resulting in symptoms such as abdominal distention or discomfort.

While muscle cramps are often associated with changes in potassium levels, they tend to occur more with hypokalemia, or low potassium levels. Monoparesis, or weakness in one limb, is not typically associated with hyperkalemia but may be seen in other neurological conditions or localized issues. Hypertension can have numerous causes, and elevated potassium itself is more commonly associated with hypotension in acute settings, especially when coupled with cardiac dysrhythmias.

Overall, abdominal distension is a direct consequence of the gastrointestinal smooth muscle's reaction to high potassium levels, making it a classic symptom of hyperkalemia.