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when pressure in the sphygmomanometer falls below systolic pressure, blood can again enter the artery. At first, blood enters only at peak systolic pressure, and the sound of blood pulsing through the artery becomes audible through the stethoscope. As the pressure falls further, the sound changes because the vessel is remaining open for longer periods. When the cuff pressure falls below diastolic pressure, blood flow becomes continuous, and the sound of the pulse becomes muffled or disappears completely.

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15y ago
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14y ago

Blood pressure naturally rises with age but certain factors cause it to be higher than normal:

- smoking/drinking

- lack of exercise

- stress

- salty diet

- obesity

- family history

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13y ago

If you mean what causes the systolic to be high while the diastolic is normal or low the answer is hardening of the arteries. Normally as the pulse of blood comes through the artery the walls stretch to accommodate the wave of blood. As the arteries get stiffer instead of stretching they just cause the pressure to go up.

If yo are asking what causes high blood pressure then the answer is that we usually do not know. Age, salt intake, weight and lack of activity all contribute. Things like pain , anxiety and stimulants cal also make it go up. Occasionally there is a diagnosable and treatable medical condition that can be reversed but this is the exception.

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12y ago

It is the pressure of the blood against the walls of the arteries.

xD o(-.-)o

hope i was able to help

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12y ago

Narrowed arteries

Kidney Disease

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15y ago

The Contraction of the ventricles.

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12y ago

When you your heart contacts

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Q: What is the cause of blood pressure?
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