Smartwatches have become increasingly popular for their ability to monitor various health metrics, including heart health. Here are some of the best options for heart health monitoring:

1. Apple Watch Series 8: Known for its comprehensive health features, including ECG and blood oxygen monitoring.
2. Fitbit Sense 2: Offers stress management tools alongside heart rate tracking and ECG functionality.
3. Samsung Galaxy Watch 5 Pro: Provides continuous heart rate monitoring and blood pressure measurement capabilities.
4. Garmin Venu 2 Plus: Excellent for athletes, with advanced heart rate metrics and stress tracking.
5. Withings ScanWatch: Combines traditional watch aesthetics with modern health monitoring features.

When choosing a smartwatch for heart health monitoring, consider factors such as accuracy, battery life, additional health features, and compatibility with your smartphone.