A 69-year-old woman calls EMS because of a severe nosebleed. Upon arrival, you note that the patient is leaning over a basin that contains an impressive amount of blood. She states that she has a history of diabetes, coronary artery disease, and migraine headaches. Her blood pressure is 170/100 mm Hg and her heart rate is 112 beats/min. Which of the following is the MOST contributive factor to her nosebleed?
Her blood pressure