Types of hypertension are as follows:
Essential
Hypertension is called essential when no apparent cause is suspected or detected. This accounts for almost 90 per cent of patients seen.
Systolic
Isolated Systolic Hypertension (ISH) is defined as a systolic BP 140 or more and a diastolic BP less than 90 mmHg. The cause of this condition is attributed to be increasing rigidity of the aortic wall.
Secondary
The term secondary hypertension is used when one or more causes are identified for the high blood pressure.