Check your heart rate on Apple Watch - Apple Support

Use Heart Rate on your Apple Watch to monitor your heart rate throughout the day.

Track your medications on Apple Watch - Apple Support

Take an ECG with the ECG app on Apple Watch - Apple Support

How to see your heart rate or pulse on Apple Watch face

Your Apple Watch - Apple Support

How to check your heart rate on Apple Watch - 9to5Mac

Apple Watch And Heart Monitoring Deals

How to Monitor Your Heart Rate on Apple Watch

Share and view health data in the Health app - Apple Support

Heart Rate Recovery Apple Watch: Tracking Your Post-Workout Progress - GadgetMates

Apple Watch Series 4 — How to Measure your Heart Rate — Apple