A 68-year-old woman with long-standing poorly controlled hypertension presents to the emergency department with severe headache, confusion, and blurred vision. Blood pressure is 230/130 mmHg. Fundoscopy reveals bilateral papilloedema. Creatinine is 210 µmol/L (baseline 90 µmol/L). There are bibasal crackles on auscultation. Which blood pressure management strategy is most appropriate over the first 1-2 hours?