Which electrolyte imbalance can occur due to decreased renal excretion?

• A. Hyponatremia
• B. Hyperkalemia
• C. Hypocalcemia
• D. Hypomagnesemia

Answer: (B)

Decreased renal excretion can lead to the accumulation of certain electrolytes in the body, particularly potassium. When the kidneys are not functioning properly or are overwhelmed, they may struggle to excrete excess potassium, resulting in hyperkalemia. This condition is characterized by elevated serum potassium levels, which can have significant cardiac implications, including arrhythmias.

The kidneys play a pivotal role in regulating electrolyte balance, and when they fail to adequately filter and excrete potassium, it begins to accumulate in the bloodstream. This imbalance is of particular concern in situations such as acute kidney injury or chronic kidney disease.

In contrast, other electrolyte imbalances mentioned, such as hyponatremia, hypocalcemia, and hypomagnesemia, are typically associated with different causes. For instance, hyponatremia often arises from excessive fluid retention rather than decreased renal excretion of sodium. Hypocalcemia may occur due to factors like vitamin D deficiency or parathyroid hormone issues rather than from impaired renal function alone. Similarly, hypomagnesemia is commonly attributed to issues with magnesium intake or gastrointestinal losses rather than directly related to renal excretion issues. Thus, hyperkalemia stands out as the correct choice due to its direct association with decreased renal excretion of