I wore 3 blood pressure watches for a month to find the most accurate - and this one wins

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High blood pressure, or hypertension, affects an estimated 1.3 billion people worldwide, according to the World Heart Federation, and it's the number one risk factor for death on a global scale. The American Heart Association estimates that half of adults in the US have high blood pressure, with a large proportion not even knowing they have the condition. There are effective means to treat high blood pressure, but it's not always easy to detect and monitor.

I exhibit symptoms of white coat syndrome, where my blood pressure spikes at the doctor's office, so it is important...

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