A patient in their 60s was admitted to the intensive care unit for gastrointestinal bleeding and shock associated with liver cirrhosis, portal hypertension, and ruptured esophageal varices. Emergency treatment included balloon tamponade of the esophagus, blood transfusions, octreotide, and vasopressin. Despite fluid resuscitation and the use of pressors, the blood pressure continued to fall, and the kidney function progressively deteriorated. Computer interpretation of a 12-lead electrocardiogram (ECG) indicated supraventricular tachycardia with right bundle-branch block and right superior QRS axis (Figure, A). The interpretation software also reported frequent premature ventricular complexes. The patient’s baseline ECG recorded a few months earlier was normal.