severe hypertension that runs a rapid course and damages the inner linings of the blood vessels and the heart and spleen and kidneys and brain; "malignant hypertension is the most lethal form of hypertension"

Severe high blood pressure causing rapid damage to other organs such as the eyes and kidneys.

Medical emergency condition where there is a sudden, rapid increase in blood pressure that can result in severe, permanent and/or life threatening consequences.

A dangerous type of hypertension marked by an unusually sudden rise in blood pressure to very high levels, often accompanied by headache, blurred vision, and seizures (see Hypertension).

Malignant hypertension is a complication of hypertension characterized by very elevated blood pressure, and organ damage in the eyes, brain, lung and/or kidneys. It differs from other complications of hypertension in that it is accompanied by papilledema. Systolic and diastolic blood pressures are usually greater than 240 and 120, respectively.