A patient with dilated cardiomyopathy is prescribed digoxin. What should the nurse assess prior to administering the medication?

Dilated cardiomyopathy involves ventricular dilation, systolic dysfunction, and reduced ejection fraction, leading to impaired myocardial contractility and decreased cardiac output. Digoxin enhances inotropy by inhibiting sodium-potassium ATPase, increasing intracellular calcium and myocardial contractile force while requiring strict cardiac monitoring due to narrow therapeutic index. Rationale: A. Monitoring blood pressure trends is important in heart failure management but is not the priority before digoxin administration. Digoxin toxicity is primarily cardiac and rhythm related rather than directly blood pressure dependent. Therefore, BP trends do not determine safe administration. B. Assessing respiratory rate and oxygen saturation evaluates oxygenation status in heart failure but does not determine digoxin safety. These parameters reflect pulmonary congestion severity rather than risk of digoxin-induced arrhythmias. They are important but not pre-administration criteria. C. Evaluating anxiety level is relevant for psychological care but has no direct relationship to digoxin pharmacologic safety. Anxiety does not influence digoxin toxicity risk or cardiac conduction effects. Therefore, it is not a priority assessment. D. Checking apical pulse for 1 full minute is essential before digoxin administration because it can cause bradycardia and atrioventricular block. A heart rate <60 beats per minute indicates need to withhold medication. This assessment directly prevents life-threatening dysrhythmias and ensures safe administration.