It's found not DCR, but Garmin.Forum user: forums.garmin.com / sports-fitness/healthandwellness/ f / venu-2-plus-964331130/284912/venu-2-plus-ecg-in-test-mode
DC Rainmaker has found a hidden ECG function in a Garmin Venu 2 smartwatch. Garmin has not acknowledged the tool's existence, and it removed the feature in a recent update.