Hypertension

Hypertension (HTN) or high blood pressure, sometimes called arterial hypertension, is a chronic medical condition in which the blood pressure in the arteries is elevated. This requires the heart to work harder than normal to circulate blood through the blood vessels. Blood pressure is summarised by two measurements, systolic and diastolic, which depend on whether the heart muscle is contracting (systole) or relaxed between beats (diastole). Normal blood pressure at rest is within the range of 100-140mmHg systolic (top reading) and 60-90mmHg diastolic (bottom reading). High blood pressure is said to be present if it is persistently at or above 140/90 mmHg.

Hypertension is classified as either primary (essential) hypertension or secondary hypertension; about 90–95% of cases are categorized as "primary hypertension" which means high blood pressure with no obvious underlying medical cause. The remaining 5–10% of cases (secondary hypertension) are caused by other conditions that affect the kidneys, arteries, heart or endocrine system.

Hypertension is a major risk factor for stroke, myocardial infarction (heart attacks), heart failure, aneurysms of the arteries (e.g. aortic aneurysm), peripheral arterial disease and is a cause of chronic kidney disease. Even moderate elevation of arterial blood pressure is associated with a shortened life expectancy. Dietary and lifestyle changes can improve blood pressure control and decrease the risk of associated health complications, although drug treatment is often necessary in people for whom lifestyle changes prove ineffective or insufficient.

Read more about Hypertension:  Signs and Symptoms, Pathophysiology, Diagnosis, Prevention, Epidemiology, Prognosis, History

Other articles related to "hypertension":

Lobeta - Hypertension
... Hypertension can result from a multitude of alterations to blood volume, heart or kidney function ... Hypertension involving a high heart rate can lead to myocardial ischemia ...
SU2C - Initiative
... Slamon, MD, has compared treating cancer with treating hypertension "If we turn cancer into a chronic disease that's manageable, have we cured it? No ... You treat hypertension, and if you successfully treat hypertension the patient may die, but they're going to die of something other than hypertension or the diseases related to ...
Science and The Melanin Theory - Hypertension
... In fact, higher rates of hypertension among Blacks are linked to norepinephrine, a substance that the body produces under stress and which constricts blood vessels ...
Hypertension - Society and Culture - Economics
... In the US 80% of people with hypertension are aware of their condition, 71% take some antihypertensive medication, but only 48% of people aware that ... Adequate management of hypertension can be hampered by inadequacies in the diagnosis, treatment, and/or control of high blood pressure ...
Secondary Hypertension - Types - Arsenic Exposure
... low dose arsenic poisoning should be inferred as a part of the pathogenesis of idiopathic hypertension ... and essential are both somewhat synonymous with primary hypertension ... Arsenic exposure has also many of the same signs of primary hypertension such as headache, somnolence, confusion, proteinuria visual disturbances, and nausea and vomiting ...