Cardiac Glycosides

Cardiac glycosides matter in REx-PN preparation because digoxin is useful only when the learner can hold two truths at once: it can improve contractility and slow AV nodal conduction, and it can become dangerous when renal function, electrolytes, rhythm, dose, or interacting medications shift. The exam trap is treating digoxin like a simple heart medication. It is better understood as a narrow-therapeutic-index medication that requires bedside reasoning before every routine-looking dose, refill, or teaching conversation. For REx-PN, the practical nursing priority is safe administration: assess the apical pulse for a full minute when required, compare findings with ordered hold parameters, recognize toxicity cues, report unsafe findings promptly, reinforce teaching, and document the cue, action, and response.