About This Test

The Potassium Test is an essential blood test that measures potassium levels, an electrolyte critical for heart, nerve, and muscle function. Potassium helps regulate fluid balance, acid-base (pH) control, and electrical activity in cells, particularly in the heart. This test is commonly included in routine checkups or a comprehensive metabolic panel, and is crucial for diagnosing kidney disease, high blood pressure, heart conditions, and metabolic imbalances. Symptoms of abnormal potassium range from muscle weakness, fatigue, and cramps to irregular heartbeats and potentially life-threatening complications. Both too high (hyperkalemia) and too low (hypokalemia) levels require immediate medical attention and can be caused by dietary deficiencies, medications, dehydration, or chronic illnesses. The test is performed via a simple blood draw, and patients may be asked about their medicines before testing, as several can affect potassium levels. Monitoring potassium supports heart and kidney health, guides medication adjustments, and prevents severe complications for at-risk patients.

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