What complication can result from hypokalemia?

Hypokalemia, which refers to a lower than normal level of potassium in the bloodstream, can lead to serious complications, one of which is cardiac arrest. Potassium is crucial for maintaining proper electrical activity in the heart. When potassium levels drop, it can disrupt the normal rhythm of the heart, leading to arrhythmias. Severe arrhythmias can ultimately progress to cardiac arrest, where the heart stops pumping effectively. This condition can be life-threatening and requires immediate medical attention.

In contrast, conditions like hyperactive muscles or excessive sweating are less directly associated with hypokalemia. While potassium does play a role in muscle function, hypokalemia typically leads to muscle weakness rather than hyperactivity. Increased blood volume is also not a direct consequence of low potassium levels; rather, it is often related to factors such as fluid management and other electrolytes. Hence, the link between hypokalemia and the risk of cardiac arrest underscores the importance of potassium in cardiovascular health.