A 52-year-old man with known cirrhosis secondary to hepatitis B presents to the emergency department with haematemesis and melaena. On examination, blood pressure is 95/60 mmHg, heart rate 118/min, and he appears icteric. Upper endoscopy reveals large oesophageal varices with active bleeding. After fluid resuscitation and blood transfusion, he receives terlipressin and antibiotics. Which of the following is the most appropriate next step in management?