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Hypertension

Hypertension is the term used to describe high blood pressure.
Blood pressure is a measurement of the force against the walls of your arteries as the heart pumps blood through the body.
Blood pressure readings are measured in millimeters of mercury (mmHg) and usually given as two numbers — for example, 120 over 80 (written as 120/80 mmHg). One or both of these numbers can be too high.

The top number is your systolic pressure.
It is considered high if it is over 140 most of the time.
It is considered normal if it is below 120 most of the time.
The bottom number is your diastolic pressure.
It is considered high if it is over 90 most of the time.
It is considered normal if it is below 80 most of the time.

Pre-hypertension may be considered when your:
Top number (systolic blood pressure) is between 120 and 139 most of the time, or
Bottom number (diastolic blood pressure) is between 80 and 89 most of the time

If you have pre-hypertension, you are more likely to develop high blood pressure.
If you have heart or kidney problems, or if you had a stroke, your doctor may want your blood pressure to be even lower than that of people who do not have these conditions.

Causes, incidence, and risk factors

Many factors can affect blood pressure, including:
How much water and salt you have in your body
The condition of your kidneys, nervous system, or blood vessels
The levels of different body hormones

You are more likely to be told your blood pressure is too high as you get older. This is because your blood vessels become stiffer as you age. When that happens, your blood pressure goes up. High Hypertensionblood pressure increases your chance of having a stroke, heart attack, heart failure, kidney disease, and early death.

You have a higher risk of high blood pressure if you:
Are African American
Are obese
Are often stressed or anxious
Eat too much salt in your diet
Have a family history of high blood pressure
Have diabetes
Smoke

Most of the time, no cause is identified. This is called essential hypertension. High blood pressure that is caused by another medical condition or medication is called secondary hypertension. Secondary hypertension may be due to:
Alcohol abuse
Atherosclerosis
Autoimmune disorders such as periarteritis nodosa
Chronic kidney disease
Coarctation of the aorta
Cocaine use
Diabetes (if it causes kidney damage)
Endocrine disorders, such as adrenal tumors (pheochromocytoma, aldosteronism), thyroid disorders, and Cushing syndrome
Medications
Appetite suppressants
Birth control pills
Certain cold medications
Corticosteroids
Migraine medications

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