You receive a call for a sick person. when you arrive, you find the patient, a 75-year-old male, lying unresponsive in his bed. his respirations are slow and irregular and his pulse is slow and weak. his daughter tells you that he fell the day before, but refused to allow her to call 9-1-1. his past medical history is significant for hypothyroidism, deep vein thrombosis, heavy alcohol use, and liver cirrhosis. his medications include blood thinners and vitamins. you should be most suspicious that this patient is experiencing: