Hypertension is considered to subsist present when a person's systolic blood impression is consistently 140 mmHg or greater, and/or their diastolic blood pressure is consistently 90 mmHg or greater. Recently, as of 2003, the Seventh Report of the Joint National Committee on hypertension Prevention, Detection, Evaluation, and Treatment of High Blood press has defined blood pressure 120/80 mmHg to 139/89 mmHg as 'prehypertension.' Prehypertension is not a disease predicament; rather, it is a designation chosen to identify individuals at remote from the equator risk of developing hypertension. The Mayo Clinic website specifies blood impression is 'analogical if it's below 120/80? but that 'some data indicate that 115/75 mm Hg should subsist the gold standard.' In patients with diabetes mellitus or kidney disease studies have shown that blood pressure over 130/80 mmHg should be considered high and warrants further treatment. Factors of essential hypertension Although no specific medical cause can be determined in essential hypertension, the most common form, several factors may contribute to it, including salt sensitivity, renin homeostasis, insulin resistance, genetics and age.