Researchers found that blood pressure readings can be off by as much as 15 mm when using an automatic blood pressure machine.
To determine whether you have hypertension, a medical professional will take a blood pressure reading. How you prepare for the test, the position of your arm, and other factors can change a blood pressure reading by or more.
Here's how to get the most accurate readings from your home blood pressure device, so you don't have to rely on an occasional in-office reading.
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