Hypertensive crisis is defined as a severe elevation in blood pressure (systolic
BP >179 mm Hg, diastolic BP >109 mm Hg), which may or may not
lead to organ damage. There are two types of hypertensive crisis:
■ Hypertensive emergency: Rapid (hours to days) marked elevation in
BP → acute organ tissue damage.
■ Hypertensive urgency: Slow (days to weeks) elevation in BP that usually
does not lead to organ tissue damage.
Jones & Fix 2009