Wrist ECG measurement

Vantage V3 has a wrist ECG sensor that enables electrocardiogram (ECG) signal recording using your watch. The wrist ECG sensor records the timing and strength of electrical signals generated by your heart using two electrodes, one of which is on the top left button and the other on the back of the watch. The ECG signal is derived from the voltage difference between the two electrodes. With the ECG test, you can record your ECG signal at rest in just 30 seconds. As a result of the test, we give you a graph of your ECG signal, as well as your average heart rate, heart rate variability, beat-to-beat interval and pulse arrival times (PAT). You can track these to keep an eye on the health of your heart and arteries.

The wrist ECG measurement allows you to perform Orthostatic test, which is based on measuring heart rate and heart rate variability, without a paired Polar heart rate sensor.

The Wrist-ECG sensor measurement feature is not intended for any medical use, diagnosis or treatment (including self-diagnosis or consultation with a doctor) and the data should not be used for any medical purposes.

Performing the test

For accurate measurement, we advise you to wear the watch at least ten minutes before the measurement. Make sure you wear the watch on the hand chosen in the settings. You can check the setting from Settings > Physical settings > I wear my watch on (Left hand / Right hand). Take the test sitting down and always at the same time of day. This feature is only intended for measurements taken at rest. For more information, see the support document Wrist ECG measurement.

  1. Wear your watch snugly on top of your wrist, just behind the wrist bone. On your watch, choose Tests > ECG > Measure now.

  2. Keep your arms relaxed in an open position on a table or in your lap. Place the index finger of your opposite hand on the top left button (LIGHT) of the watch. Don't press the button.

  3. After the watch finds the signal, wait until the timer runs out.

  4. After the test, the following results will be displayed on your watch:

    • HR avg (average heart rate)
    • HRV (heart rate variability)
    • Beat-to-beat interval

    A typical resting heart rate is something between 40 and 100 beats per minute. The average values are always personal, so you should only compare the heart rate values against your own previous readings. Heart rate variability is the variation in time between successive heartbeats. The average interval between heartbeats is called a beat-to-beat interval.

    You can view your latest result on your watch in Tests > ECG > Latest result.

    More detailed information on your heart rate, as well as a graph of your ECG signal are available in Polar Flow app after syncing your watch with it.

ECG test results in the Polar Flow app

Sync your watch with the Polar Flow app to see your ECG test results in the app.

Note that you must sync your watch using the Flow app. ECG test results cannot be synced using the Polar FlowSync software on your computer.

You can check the ECG test results for the current day from the Diary. Tapping the card opens the detailed test result view.

In the detailed test result view, you will see the following results in addition to the results displayed on the watch:

  • PAT at relaxation and PAT at contraction: Pulse arrival time (PAT) refers to the time it takes for the pressure wave generated by your heartbeat to reach your wrist. PAT at contraction and PAT at relaxation are measured at two different time points of the pressure wave.

  • ECG graph: In the ECG graph, the spikes represent your heartbeats. You can scroll the graph vertically by swiping.

You can export the ECG test result to a PDF file. Tapping the list icon opens your previous ECG test results in the calendar search view.

Learn more about Wrist ECG measurement.