Which of the following conditions can lead to heart failure?

A. Blood urea nitrogen assesses kidney function but is less directly related to digoxin toxicity risk.
B. Creatinine also reflects kidney function but is not the highest priority in this context.
C. Hemoglobin levels are not directly related to digoxin administration.
D. Potassium levels are critical to review because hypokalemia increases the risk of digoxin toxicity, and hyperkalemia can also affect the drug's efficacy. Monitoring potassium is essential before giving digoxin.

A. Hyperthermia, increased thirst, and polyuria are not related to Cushing's Triad; these symptoms suggest other conditions such as diabetes insipidus.
B. Confusion, blurred vision, and dizziness are nonspecific symptoms and do not define Cushing’s Triad.
C. Cushing's Triad is a classic neurologic emergency that indicates increased intracranial pressure. It is characterized by the triad of bradycardia (slow heart rate), decreased or irregular respirations, and hypertension (high blood pressure). This response is the body’s attempt to maintain cerebral perfusion in the face of rising intracranial pressure.
D. Tachycardia, shallow respirations, and hypotension are not consistent with Cushing’s Triad.