What condition may cause abnormalities in EKG readings?

Abnormalities in EKG readings can indeed be caused by high serum potassium levels, a condition known as hyperkalemia. Elevated potassium levels in the blood can significantly impact the electrical activity of the heart. The heart relies on a delicate balance of electrolytes, including potassium, to maintain its normal rhythm and function. When potassium levels rise, it can lead to characteristic changes on the EKG, such as peaked T waves, widened QRS complexes, or even life-threatening arrhythmias.

Serum potassium plays a critical role in myocardial depolarization and repolarization processes, and imbalances can disrupt these processes, resulting in observable changes on the EKG. Therefore, monitoring potassium levels is essential in patients at risk for cardiac issues, particularly in those with conditions such as kidney disease or those taking certain medications that affect potassium levels.

In contrast, while both high and low serum potassium can cause EKG changes, the question specifically highlights high levels as a common cause of abnormalities, which aligns with the understanding of hyperkalemic effects on cardiac function.