ScanWatch 2 sends you a notification when:

• Your heart rate is high or low

How does ScanWatch 2 measure your heart rate and rhythm?

Heart rate and rhythm are measured by the exclusive PPG v2 multi-wavelength sensor, which uses 2 absorbed by the blood and skin to measure blood flow change in your wrist’s microvascular beds, made up of arterioles, capillaries, and venules. Learn more +

By default, ScanWatch 2 triggers a measurement from time to time when you are stationary or walking. Note that your heart rate data is regularly transferred to the Withings App where you can see results. Learn more +

High or low heart rate notifications

If you have been inactive for at least 10 minutes (also known as a rest period) and ScanWatch 2 detects a heart rate that is high compared to your usual heart rate, you will receive a notification. Similarly, if your heart rate falls below a certain value of beats per minute, ScanWatch 2 will send you a notification.

Please note that any slight movement (such as reaching for an object) can 'reset' this rest period. 

The normal heart rate is between 50 and 100 bpm, but these figures may vary depending on the person. Therefore, you can change the high and low heart rate thresholds in Withings App. You can also turn this feature on and off at will. Find out how +

If you want to know more about high or low HR and arrhythmia, read the article on the American Heart Association’s website.

What should I do if I receive a notification?

• High Heart Rate Notification
  If these notifications become too frequent and you do not know the events they may be related to (often stress, anxiety, or strong emotions), do not hesitate to inform your doctor of this phenomenon. Many pathologies can temporarily increase heart rate, and your doctor will be able to make a diagnosis and define appropriate treatment.
• Low Heart Rate Notification
  If these notifications become too frequent when you are awake, do not hesitate to make an appointment with your doctor to discuss this phenomenon. A low heart rate may be a sign of cardiovascular disease.