A blood pressure monitor watch is a digital device worn on the wrist that can measure a person’s systolic and diastolic blood pressure. These numbers are associated with the two aspects of blood pressure—when the arteries fill with blood and relax as the heart beats. Systolic blood pressure readings are presented before or above diastolic blood pressure readings. A systolic blood pressure reading of no more than 120 millimeters of mercury (mmHg) and a diastolic blood pressure reading of no more than 80 mmHg is considered normal by the American Heart Association .
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People who want to monitor their blood pressure closely may be attracted to blood pressure monitor watches—and for good reason. “Digital tools empower patients to take charge of their own health,” says Rigved Tadwalkar, M.D., a cardiologist at Pacific Heart Institute in Santa Monica, California, and Forbes Health Advisory Board member. Ideally, a blood pressure monitor watch can almost immediately show whether the person wearing it has high, low or normal blood pressure. However, Dr. Tadwalkar says they’re not yet tools people can rely on for accurate readings outside a doctor’s office.
How Blood Pressure Monitor Watches Work
Some blood pressure monitor watches use a technology called photoplethysmography, or PPG, that detects blood flow in the skin via light sensors, catching variations in the amplitude and shape of the pulse and extracting information from those variations, explains Dr. Tadwalkar. However, the accuracy of the readings can vary from person to person depending on the user’s body size, age, degree of skin pigmentation and sometimes even the lighting in the room.
Other blood pressure monitor watches use a different technology that employs a miniature inflatable cuff within the wristband.
How to Use a Blood Pressure Monitor Watch
Blood pressure monitor watches have the appearance of a digital wristwatch. Typically, no one other than the wearer can tell that the watch is measuring blood pressure or gathering other health statistics. Some of these watches can also connect with smartphone apps to help users track their health data over time.
“When you look at the American Heart Association’s guidance on how to get an accurate blood pressure reading, it’s very important to first rest for five minutes to reach a calm state,” says Francoise Marvel, M.D., assistant professor of medicine in the Johns Hopkins Division of Cardiology in Baltimore. In this relaxed state, take at least three readings. One shouldn’t smoke, exercise or consume any caffeinated drinks within 30 minutes of taking a blood pressure reading, adds Dr. Marvel.
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Typically, blood pressure monitor watches function in opposition to this advice. “Being on the go and taking a blood pressure reading don’t go together,” says Dr. Marvel. “You want to be in a state of total relaxation.”
Furthermore, Dr. Tadalkar suggests blood pressure monitor watch wearers need to lift the watch to the level of their heart when measuring their blood pressure. “If it’s lower than the heart, it can give a falsely elevated value,” he says.
Good Smartwatch with ECG
This provides a good presentation of an ECG that is displayed, and easy to review, on your phone. Without a phone, however, the results you get are much more difficult to access on the small display.
The data is stored and sharable with medical providers, which is fine. with the ease and setup done the way glucose monitoring often is.
One nice feature is that you can have a "guest" use the device and not have their data interfere with what you've collected on yourself.
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