
You looked at 135 and relaxed.
But the 90 changes the reading.
Blood pressure is not calculated by averaging the two numbers. Each number matters, and the one that falls into the higher category determines how the reading is interpreted.
The upper number is the pressure created when your heart pumps blood out.
The lower number is the pressure in your blood vessels while your heart rests between beats.
With a reading of 135/90, the lower number is already at the hypertension threshold under WHO and International Society of Hypertension guidance. Under AHA/ACC guidance, a lower number of 90 falls within Stage 2 hypertension.
Does one reading confirm that you have hypertension? Usually, no.
Sit quietly for five minutes and repeat the measurement correctly. Keep a record of readings taken on different days and discuss them with your clinician.
Your clinician will also consider other factors that affect your chances of developing heart disease or having a stroke. These include diabetes, kidney disease, high cholesterol, smoking and any previous heart or stroke problem.
Do not dismiss 135/90 as “not too bad.”
Save this poster. The number you almost ignored may be the one that matters most.
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