Samsung Health Monitor app is for you. You can use it with your Galaxy watch and phone to record and share your ECG rhythm new electrocardiogram (ECG or EKG) feature. You’ll need to install the app and then sync your devices using Bluetooth and the Galaxy Wearable app before you can begin recording your ECG.
For Samsung Galaxy Watch 1 / 2 / 3 / 4 and possible for new versions.
https://www.samsung.com/us/support/answer/ANS00087702/
The addition of an electrocardiogram (also known as ECG or EKG) sensor allows you to simply hold your finger on the watch face, and Galaxy Watch will track your heart rate and check the sinus rhythm, offering effective heart monitoring right on your wrist.
https://www.samsung.com/global/galaxy/what-is/ecg/
For Samsung Galaxy Watch 1 / 2 / 3 / 4 and possible for new versions.
https://www.samsung.com/us/support/answer/ANS00087702/
The addition of an electrocardiogram (also known as ECG or EKG) sensor allows you to simply hold your finger on the watch face, and Galaxy Watch will track your heart rate and check the sinus rhythm, offering effective heart monitoring right on your wrist.
https://www.samsung.com/global/galaxy/what-is/ecg/