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Hello,
Dear customer

Regarding what you mentioned,

the hypertension or elevation of the arterial blood pressure is defined when the blood pressure is above 140/90 mmHg on two separate occasions.

What does this reading 140/80 mg means ?

This reading is within the  normal ranges.

What are the other possible diagnostic tests ?

There are tests such as fasting plasma glucose , liver function test and renal function tests/

What should you do in this case ?

 we recommend that you visit your  GP doctor or the internist doctor so that the doctor could do a full clinical evaluation of your case in order to confirm that everything is going well.
Stay well.
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