A 35-year-old patient developed general anxiety, brief agitation, dyspnea, and pain behind the sternum and in the lumbar region during the transfusion of 400 ml of packed erythrocytes. Objectively, the following is observed: cyanosis of the skin and mucosa, tachycardia110/min, blood pressure 90/40 mm Hg. What is the most likely diagnosis in this case?