<unk>  is a term used to describe a severe elevation in the blood pressure which may or may not be associated with end-organ damage.  Noncompliance with antihypertensive medications is the most common cause of<unk> .<unk>  includes both<unk>  emergency and<unk>  urgency.<unk>  urgency is the severe elevation in the blood pressure without any evidence of acute end-organ damage.<unk>  emergency mostly falls into stage 2 of hypertension.  It is usually the severe elevation in the blood pressure (systolic blood pressure >180 mm Hg, or diastolic blood pressure >120 mm Hg) complicated by acute end-organ dysfunction, such as<unk>  encephalopathy, eclampsia, dissecting aortic aneurysm, acute left ventricular failure with pulmonary edema, acute myocardial infarction, acute renal failure, or symptomatic microangiopathic hemolytic anemia.  The treatment of<unk>  urgency requires a gradual reduction in blood pressure over 24 to 48 hours.  In<unk>  emergency,  the treatment should be targeted to reduce the blood pressure by not more than 25% within the first hour; when blood pressure is stable, it should be reduced to 160/100-110 mmHg within the next 2 to 6 hours.
Hypertensive crisis
Diabetic coma
Oculogyric crisis
Heat syncope
Subarachnoid hemorrhage
Idiopathic intracranial hypertension
Paroxysmal hypertension
Transient ischemic attack