Question: can atrial fibrillation be caused by low potassium?
Answer: When potassium levels drop below 3.0 mEq/L (mEq/L stand for milliequivalents per liter of blood) the body enters a condition known as hypokalemia. Hypokalemia can lead directly to cardiac arrhythmia and atrial fibrillation. But hypokalemia can also cause: Muscle weakness.