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Hypertension, also known as high blood pressure, is a long-term medical condition in which the blood pressure in the arteries is persistently elevated. [10] . High blood pressure usually does not cause symptoms itself. [1] . Untreated very high (>180/110 mmHg) or rapidly rising blood pressure (such as in eclampsia) can overcome normal microvascular autoregulation. For decades, high blood pressure was defined as 140/90 mm Hg. In November, 2017, new United States guidelines lowered the threshold for diagnosing the condition. According to new guidelines, anyone with a reading of 130/80 mm Hg or higher has blood pressure. Based on this new definition, nearly half of Americans now fall into this group. Blood pressure is now categorized as follows: Normal: less than 120/80 mm Hg Elevated: 120/80 to 129/79 mm Hg Stage 1 hypertension: 130/80 to 139/89 mm Hg ... Hypertension is diagnosed by measuring blood pressure. The Systolic pressure would be the first readings viz. a pressure by which the heart pumps blood through the body, and second readings would be the Diastolic pressure, meaning a pressure at which the heart relaxes and refills the blood.
