What EKG findings are commonly associated with digoxin toxicity?

In cases of digoxin toxicity, one of the hallmark EKG findings includes the presence of premature ventricular contractions (PVCs) and atrial tachycardia, often accompanied by varying degrees of AV block. Digoxin affects the conduction system of the heart, leading to increased vagal tone and subsequent AV nodal effects. This can cause slowed conduction and blocked impulses, resulting in both PVCs and transient atrial tachycardia.

Atrial tachycardia with AV block is particularly notable because digoxin can cause characteristic alterations in atrial conduction and decrease the ability of the AV node to transmit impulses. As the atria depolarize more rapidly, this can lead to a situation where some of the impulses are dropped, creating a block.

While other options may present with different types of findings, such as ST elevations or PR interval changes, they do not specifically correlate with the manifestations expected in digoxin toxicity as clearly as the PVCs and atrial tachycardia. Hence, this option provides the most accurate association with the clinical effects of digoxin. Recognizing these changes on an EKG is vital for diagnosing digoxin intoxication and for managing affected patients appropriately.