What EKG finding is typical in patients with digoxin toxicity?

In patients with digoxin toxicity, the typical EKG finding is characterized by a slurred upslope on the QRS complex, often referred to as "scooped" ST segments. This distinct appearance occurs due to the effect of digoxin on the cardiac tissue, which enhances vagal tone and leads to changes in the myocardial action potentials. The slurring represents a prolonged depolarization phase, which is a hallmark of digoxin's effect on the cardiac conduction system.

This finding can help healthcare providers identify digoxin toxicity, especially when considering the patient's clinical presentation, since digoxin has a narrow therapeutic index and can rapidly lead to toxic effects. Recognizing this unique EKG pattern is essential for timely diagnosis and management of digoxin toxicity, helping to prevent more severe complications. Other possible EKG changes associated with digoxin toxicity can include various degrees of heart block and atrial arrhythmias, but the slurred upslope is particularly indicative.