Primary hypertension accounts for almost 95 percent of the hypertensive population. The cause of this type of hypertension remains unknown.
High blood pressure that is of an emotional or psychological origin and not a secondary consequence of an identifiable physical disorder.
High blood pressure without any obvious cause.
High blood pressure (hypertension) for which no specific cause can be found.
Also known as high blood pressure; a chronic condition with no known organic cause that is characterized by systolic blood pressure of 140 mm Hg or higher or diastolic blood pressure of 90 mm Hg or higher.