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Blood pressure changes throughout the day, so several above average readings must be taken to diagnose hypertension
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Blood pressure is a measure Canada Goose Online of the force of your blood pressing Canada Goose sale against the walls of your larger blood vessels, or arteries, as it canada goose black friday sale is pumped around the body by your heart.
The level of pressure reflects the amount of blood pumped out by the heart and the amount of resistance by the blood vessels to the canada goose uk outlet flow of the blood (which depends how narrow or wide the blood vessels are).
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canada goose outlet black friday Blood pressure changes throughout the day, going up during exercise and down during sleep. It can also be affected by feeling anxious. So high blood pressure is diagnosed only once an above average reading has been taken on a number of different occasions. canada goose outlet black friday
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High blood pressure rarely has obvious symptoms
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Watch Dr Alice Roberts increase her blood pressure using a large spider
Blood pressure measurements consist of two readings:
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Systolic pressure is the canada goose store larger number of the two readings.
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goose outlet canada In over 90% of cases, the cause of high blood pressure is unknown. This is called primary (or essential) hypertension. goose outlet canada
In the remaining 10%, picframer it is as a result of an underlying problem, such as kidney disease, abnormalities in the blood vessels, adrenal gland tumours or certain drugs and medicines. This is known as secondary hypertension, and the blood pressure usually returns to normal when the underlying issue is treated.
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Lifestyle factors that increase the risk include drinking too much alcohol and not doing enough exercise. A recent study suggested eating a high salt diet could increase canada goose uk shop the risk of developing the condition by damaging blood vessels over a long period of time.
Smoking a cigarette immediately raises blood pressure as the chemicals in cigarette smoke stimulate the arteries to constrict. These chemicals can also damage the lining of the artery walls, causing them to narrow over time and increase blood pressure in a more chronic way.
Sudden high levels buy canada goose jacket cheap of stress can also cause a dramatic but temporary increase in blood pressure, which may be enough to trigger a brain haemorrhage or stroke.