Which of the following is not a symptom of hyperkalemia?

• A. Muscle weakness
• B. Cardiac arrhythmias
• C. Paralysis
• D. Hypertension

Answer: (D)

In the context of hyperkalemia, hypertension is not typically a symptom. Hyperkalemia, which refers to elevated potassium levels in the blood, primarily affects muscle and cardiac function due to potassium's critical role in electrical signaling.

Muscle weakness, cardiac arrhythmias, and paralysis are all direct manifestations caused by high potassium levels. The increased extracellular potassium affects the resting membrane potential of cells, leading to decreased excitability of muscle fibers—which accounts for muscle weakness and can progress to paralysis in severe cases. Additionally, hyperkalemia can disrupt cardiac electrical activity, leading to arrhythmias, which can be life-threatening.

Unlike the other symptoms, hypertension is not a commonly associated problem with hyperkalemia. In fact, high potassium levels can sometimes lead to hypotension, particularly in acute settings, but the relationship can be complex depending on the underlying causes and overall patient condition. Furthermore, hypertension is often related to other factors like sodium balance or fluid overload rather than directly to potassium levels. Thus, the correct identification of hypertension as not being a symptom of hyperkalemia is accurate in this context.