What are signs of digoxin toxicity that a nurse should monitor in a client?

Bradycardia and visual disturbances are pivotal signs of digoxin toxicity that a nurse should closely monitor. Digoxin has a narrow therapeutic index, meaning the difference between therapeutic and toxic doses is small. When toxicity occurs, it can lead to changes in heart rate, particularly bradycardia, which is a significant and potentially dangerous effect as it may indicate a compromised cardiac function.

Visual disturbances can manifest as yellow-green halos around lights or objects, blurred vision, or even a complete change in color perception, often described as "xanthopsia." These symptoms stem from digoxin’s pharmacologic effects on the retina and other neural circuits involved in vision, further solidifying the connection between digoxin use and potential toxic reactions.

Monitoring for these signs is crucial as they can guide timely interventions to prevent severe complications that may arise from digoxin toxicity. The acknowledgment of these specific symptoms aids healthcare providers in ensuring safe administration of the medication and adherence to monitoring protocols.