These personal EKG monitoring options can help you know whether your heart is beating as it should as you go about your daily ...

ForbesApple Reveals One New Way An Apple Watch Could Save LivesBy Andrew ... some form of blood pressure measurement rely on the photoplethysmography (PPG) hardware used for all-day heart rate ...

The Apple Watch Series 3 improved upon its predecessors ... It does this via a technology known as photoplethysmography. Apple increased the rear crystal's size, but only by 0.25 millimeters ...