Hyperkalemia is most likely to cause which symptom?

Hyperkalemia is most likely to cause which symptom?

• A. Dysrhythmias
• B. Dry skin
• C. Hypoglycemia
• D. Coughing

Answer: (A)

High potassium levels disrupt the heart’s electrical system. Potassium sets the resting membrane potential of cardiac cells, so when extracellular potassium rises, the cells’ electrical gradient shifts toward threshold. This alters conduction and excitability in the heart, which can produce abnormal rhythms. In practice, hyperkalemia commonly leads to changes in heart rhythm ranging from mild conduction slowing to potentially life‑threatening dysrhythmias such as ventricular arrhythmias or bradyarrhythmias, especially as levels rise further. That’s why dysrhythmias are the symptom most closely linked to hyperkalemia. Dry skin, hypoglycemia, and coughing are not typical direct consequences of elevated potassium and don’t reflect the primary cardiac effect of this electrolyte disturbance.

High potassium levels disrupt the heart’s electrical system. Potassium sets the resting membrane potential of cardiac cells, so when extracellular potassium rises, the cells’ electrical gradient shifts toward threshold. This alters conduction and excitability in the heart, which can produce abnormal rhythms. In practice, hyperkalemia commonly leads to changes in heart rhythm ranging from mild conduction slowing to potentially life‑threatening dysrhythmias such as ventricular arrhythmias or bradyarrhythmias, especially as levels rise further.

That’s why dysrhythmias are the symptom most closely linked to hyperkalemia. Dry skin, hypoglycemia, and coughing are not typical direct consequences of elevated potassium and don’t reflect the primary cardiac effect of this electrolyte disturbance.