A 60-year-old man was hospitalized six days ago for acute myocardial infarction. Today, he began complaining of vague epigastric pain; however, an ECG and cardiac enzymes test ruled out an MI. Several hours later, he began to feel dizzy and passed a large amount of dark, bloody stool per rectum. Shortly after that, he vomited approximately 100 ml of blood. His blood pressure is 90/60 mmHg, and his pulse rate is 84 beats/min.
He is transferred to the ICU for further monitoring. What should be the priority for managing this patient? NOTE: No other information about the patient is available. *This Case Challenge is from the Editorial Team of Docplexus and is meant for educational purposes only.